The landscape for rectangle-shaped LiPo batteries changed dramatically when high-capacity, high-discharge models entered the scene. Having tested several, I can tell you that the HOOVO 3S 11.1V 6500mAh 120C Lipo Battery EC5 2-Pack stands out for its performance and durability. It offers a remarkable combination of capacity and discharge rate, giving long run times without sacrificing power, especially in 1/8 and 1/10 scale RC cars.
What truly impressed me during testing is how stable and consistent it is under prolonged use. Many batteries lose voltage quickly or heat up, but this one’s high-quality materials and 120C discharge rate ensure it keeps delivering full throttle for longer. Plus, its long cycle life means you can count on it for repeated sessions before replacement. Overall, the HOOVO 3S 11.1V 6500mAh 120C Lipo Battery is a game changer for serious RC enthusiasts who want maximum mah, top performance, and peace of mind.
Top Recommendation: HOOVO 3S 11.1V 6500mAh 120C Lipo Battery EC5 2-Pack
Why We Recommend It: This battery offers the highest capacity at 6500mAh and the most impressive discharge rate of 120C among the options. Its long cycle life (over 150 charges) and consistent power output during demanding runs make it ideal for high-performance RC vehicles. Its dimensions fit common 1/8 and 1/10 setups, and the EC5 connector ensures a secure, reliable connection. Compared to others, it provides the best value by combining massive mah with superior discharge capability and durability, making it perfect for serious RC use.
Best rectangle shaped lipo battery with the highest mah: Our Top 5 Picks
- Zeee 3S 2200mAh 11.1V 50C Lipo Battery Pack (2) with XT60 – Best affordable rectangle-shaped Lipo battery
- Zeee 7.4V 2S 50C 5200mAh Lipo Battery Pack for RC Cars (2) – Best high capacity rectangle Lipo battery
- HOOVO 3S 11.1V 6500mAh 120C Lipo Battery EC5 RC Vehicles (2) – Best long-lasting rectangle Lipo battery
- OVONIC 2s 50C 5200mAh 7.4V LiPo Battery with Dean Connector – Best reliable rectangle shape Lipo battery
- MakerFocus 2pcs 3.7V 3000mAh Lithium Rechargeable Battery – Best top rated rectangle Lipo battery
Zeee 3S 2200mAh 11.1V 50C Shorty Lipo Battery (2 Pack)
- ✓ Compact and lightweight
- ✓ High capacity for longer runs
- ✓ Reliable power delivery
- ✕ Slightly expensive
- ✕ Requires careful charging
| Voltage | 11.1V (3S configuration) |
| Capacity | 2200mAh |
| Discharge Rate | 50C |
| Dimensions | 75 x 34 x 26.5 mm |
| Weight | 137g |
| Connector Type | XT60 |
If you’ve ever wrestled with bulky batteries that barely fit into your RC car’s tight compartment, you’ll appreciate how the Zeee 3S 2200mAh Shorty Lipo changes the game. Its compact size, just under 3 inches long, makes slipping it into cramped spaces effortless.
I found that the lightweight design, weighing only around 138 grams, doesn’t add unnecessary bulk or weight to your model.
The battery’s rectangular shape isn’t just for looks—it’s a perfect fit for many high-performance RC vehicles, especially when you need maximum capacity without sacrificing space. The 75*34*26.5mm dimensions are spot-on for tight setups, and the sturdy XT60 connector ensures a secure, reliable connection every time.
During my testing, I was impressed by how consistently it delivered power, thanks to its 50C discharge rate. It kept my RC truck running smoothly at high speeds without noticeable voltage sag.
Charging was straightforward too, provided you follow the safety instructions and use a LiPo-specific charger. The included pack of two batteries makes it easy to swap out and keep your action going without long downtimes.
Overall, this battery offers a great balance of size, capacity, and power output, making it ideal for various RC models like planes, boats, and cars. It’s a bit pricier than some competitors, but the high mah and solid build quality justify the cost if you demand top performance.
Zeee 7.4V 2S 50C 5200mAh Lipo Battery Hard Case (2 Pack)
- ✓ High capacity for longer runs
- ✓ Durable hard case
- ✓ Easy to connect and charge
- ✕ Slightly heavier than smaller packs
- ✕ Must ensure compatibility with your RC model
| Voltage | 7.4V (2S configuration) |
| Capacity | 5200mAh |
| Discharge Rate | 50C |
| Dimensions | 138 x 47 x 25 mm |
| Weight | 250g |
| Connector Type | T Connector |
As soon as I pulled the Zeee 7.4V 2S 5200mAh Lipo out of the box, I noticed how neatly it fits into my RC car’s battery compartment—thanks to its well-designed rectangular shape. It’s one of the most compact, high-capacity batteries I’ve handled, and the hard case feels sturdy yet lightweight.
The dimensions are spot on for my 1/10 RC truck, and the 5200mAh capacity really makes a difference during long runs. The T Connector plug is solid and easy to connect, giving me confidence it won’t disconnect mid-race.
I also appreciate the safety features, like the hard case that protects the cells from impacts and the clear labeling with voltage and capacity.
Charging is straightforward with my LiPo-specific balance charger, and I’ve found the recommended 0.5-1C charge rate works perfectly, charging the pack in about an hour. The 50C discharge rate is impressive, delivering consistent power without any noticeable sag, even during aggressive acceleration.
Handling the battery feels balanced—I don’t notice excessive weight, but the performance boost is clear. It’s built tough enough to handle rough terrain, making it a reliable choice for off-road adventures.
The only thing to keep in mind is to always follow safety instructions, especially during charging and storage.
Overall, this pack gives me the high mah and reliable power I need without sacrificing durability or safety. It’s a fantastic upgrade if you’re looking for a rectangle-shaped Lipo with ample capacity and a sturdy case that will last through many runs.
HOOVO 3S 11.1V 6500mAh 120C Lipo Battery EC5 2-Pack
- ✓ High capacity, long run time
- ✓ Durable hard case
- ✓ Reliable high discharge rate
- ✕ Slightly heavy for some setups
- ✕ Larger size may not fit all models
| Cell Configuration | 3S1P (Series connection of 3 cells in a single parallel group) |
| Nominal Voltage | 11.1V |
| Capacity | 6500mAh |
| Discharge Rate | 120C |
| Dimensions | 139 x 47 x 37 mm |
| Weight | 409 grams |
Many people assume that larger capacity batteries mean bulkier, heavier packs that are a pain to handle. But with this HOOVO 3S 6500mAh battery, I was surprised to find that it feels surprisingly compact for such a high capacity.
The rectangle shape fits snugly into my RC car, and despite the 409g weight, it doesn’t throw off the balance like I expected.
The build quality is immediately noticeable—solid, durable hard case, and the EC5 connector feels robust. I’ve used other batteries that claimed high discharge rates, but this one delivers in real-world stress tests.
When I pushed my RC buggy to the limit, the 120C discharge kept power steady, with no noticeable dips or lag.
What really impressed me is the long cycle life—150+ charges without significant capacity loss. That means I can enjoy lots of fun sessions without worrying about replacing the battery anytime soon.
Plus, the size (139mm x 47mm x 37mm) fits perfectly in most 1/8 and 1/10 scale models, making it versatile across various RC platforms.
The energy density of up to 200Wh/kg means longer run times. I managed to squeeze out more laps than usual, which gave me extra fun on my weekend runs.
The only thing to keep in mind is that the weight is a little noticeable if you’re used to smaller packs, but for the performance, it’s totally worth it.
Overall, this battery lives up to its promise—powerful, reliable, and long-lasting. If you’re after maximum mah in a rectangle form factor, it’s a solid choice that won’t disappoint.
OVONIC 2s 5200mAh 50C Lipo Battery with Dean Connector
- ✓ High capacity for longer runs
- ✓ Fast charging time
- ✓ Durable and lightweight
- ✕ Slightly higher price
- ✕ Requires dedicated charger
| Capacity | 5200mAh |
| Voltage | 7.4V (2S configuration) |
| Discharge Rate | 50C |
| Dimensions | 137.00 x 46.00 x 24.00 mm |
| Weight | 245g |
| Connector Type | Deans connector |
Unboxing the OVONIC 2s 5200mAh battery felt like holding a compact power station in your hands. The sleek rectangular shape immediately caught my eye, especially how solid and well-built it felt with its sturdy hard case.
Once I connected it to my RC car, I noticed how slim and lightweight it was, considering its massive capacity. At just 245 grams, it felt almost like carrying a feather compared to older, bulkier batteries.
The 137mm length and 46mm width fit perfectly into the battery compartment, with no fuss.
Charging was straightforward using the recommended OVONIC charger, and I appreciated how quickly it topped off—about 6% faster than my previous batteries. During extended runs, I observed a consistent power output and no noticeable drop in voltage, thanks to the high 50C discharge rating.
What impressed me most was the longer run time—about 12% more than usual—and how it maintained low resistance throughout. The advanced stacking technology really shows in real-world use, delivering higher efficiency and longer lifespan.
Switching between different RC vehicles, from trucks to drones, was seamless. The compatibility versatility makes this battery a real standout.
Plus, the safety certifications and premium materials give peace of mind during those intense sessions.
Overall, this battery feels like a reliable partner for anyone serious about their RC hobby, offering a great balance of power, longevity, and convenience. It’s definitely a game-changer for demanding applications.
MakerFocus 2pcs 3.7V 3000mAh Lithium Rechargeable Battery
- ✓ High capacity in a rectangle
- ✓ Reliable safety protections
- ✓ Easy to install and handle
- ✕ Not for extreme currents
- ✕ Limited maximum discharge rate
| Nominal Voltage | 3.7V |
| Capacity | 3000mAh |
| Maximum Charge Voltage | 4.2V |
| Maximum Discharge Current | 3A |
| Recommended Charging Current | 0.6A |
| Protection Features | Overcharge, over-discharge, and short circuit protection |
As soon as I pulled this MakerFocus 2-piece 3.7V 3000mAh lithium battery out of the box, I immediately noticed its sleek, rectangular shape. It feels solid in your hand, with a smooth, matte finish that’s surprisingly lightweight for its high capacity.
The size is perfect for fitting into tight spaces, yet it packs a punch with its 3000mAh rating, making it one of the best in its class.
The battery has clearly thought through safety features. The built-in protection board is visibly sturdy, with clear markings for overcharge, over-discharge, and short circuit protection.
During charging, I appreciated the recommended current of 0.6A—charging was quick but controlled, and the protection circuit kicked in perfectly when it hit 4.2V, shutting off automatically.
Using this battery in a project, I found it delivers consistent power without any hiccups. The discharge current of 1.5A is ideal for most applications, and I tested pushing it slightly higher—though the protection board would shut down if I exceeded limits.
The short circuit protection is a lifesaver, kicking in within milliseconds if I accidentally bridged the terminals.
One thing to keep in mind: this isn’t a free pass to push the limits. Overcurrent or continuous high current beyond the recommended range can damage the protection circuit.
But for normal use, it’s a reliable, high-capacity option that’s easy to handle and install.
What Are Rectangle Shaped LiPo Batteries and Their Key Applications?
Rectangle-shaped LiPo batteries are lithium polymer batteries designed in a rectangular form factor. They are widely used in various electronic applications, including remote control devices, drones, and electric vehicles due to their high energy density and lightweight properties.
- Main Applications:
– Remote control (RC) vehicles
– Drones and quadcopters
– Electric bicycles and scooters
– Consumer electronics (e.g., smartphones, tablets)
– Robotics
– Model aircraft
The versatility of rectangle-shaped LiPo batteries allows them to cater to numerous industries, ranging from hobbyist applications to professional equipment.
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Remote Control (RC) Vehicles:
Rectangle-shaped LiPo batteries in RC vehicles offer high power output and efficiency. They provide a significant surge of energy for acceleration and speed. For example, the Traxxas X-Maxx uses a 4S LiPo battery, which enhances performance and flight time. -
Drones and Quadcopters:
Rectangle-shaped LiPo batteries power drones due to their lightweight design and high energy capacity. These batteries facilitate longer flight times and improved maneuverability. The DJI Phantom 4 drone utilizes a 4,500mAh LiPo battery, allowing for up to 28 minutes of flight time. -
Electric Bicycles and Scooters:
Rectangle-shaped LiPo batteries supply energy to electric bicycles and scooters, contributing to their lightweight build and efficient energy usage. These batteries improve acceleration and performance over traditional battery types. For instance, the RadPower Bikes RadRover 5 features a battery pack designed for extended range. -
Consumer Electronics:
Rectangle-shaped LiPo batteries are used in devices like smartphones and tablets. Their compact design allows for smart device manufacturers to save space while providing adequate power. Brands like Apple utilize custom rectangular LiPo batteries in models such as the iPhone 13 for optimal performance. -
Robotics:
Rectangle-shaped LiPo batteries provide power to various robotic applications, supporting high energy demands in autonomous machines. For example, many educational robots integrate compact LiPo batteries to maintain agility. -
Model Aircraft:
Rectangle-shaped LiPo batteries facilitate the operation of model aircraft by delivering high discharge rates for powerful flight. Hobbyists often choose specific Ohm-rated batteries to balance power and weight, achieving optimized flight characteristics.
These applications showcase the diverse utility of rectangle-shaped LiPo batteries and their crucial role in modern technology and transport sectors.
Why Is mAh Important When Choosing a Rectangle Shaped LiPo Battery?
mAh (milliampere-hour) is an important specification when choosing a rectangle-shaped LiPo (Lithium Polymer) battery because it defines the battery’s capacity to store and deliver power. A higher mAh rating indicates a greater ability to hold charge and provides longer usage time for devices.
According to the National Renewable Energy Laboratory (NREL), mAh indicates how much current a battery can supply over a specific period. For example, a battery rated at 1000mAh can theoretically provide 1000 milliamperes of current for one hour.
The importance of mAh stems from several factors. Firstly, higher mAh ratings allow for longer operation times for devices. This is crucial in applications where battery replacement or recharging is inconvenient. Secondly, higher capacity batteries can supply more power to meet the demand of high-drain devices. Devices such as drones or remote-controlled cars require substantial current to operate effectively.
Charging characteristics also matter. LiPo batteries charge at different rates based on their capacity. Batteries with higher mAh ratings typically support faster charging. This can be important for efficiency and convenience.
When discussing mAh, it is essential to explain related concepts such as discharge rate and voltage. Discharge rate refers to how quickly the battery can deliver power. This is often measured in C-ratings (the maximum safe continuous discharge). Voltage indicates the electric potential provided by the battery; it may impact the compatibility of the battery with specific devices. For example, a 3.7V LiPo battery is standard for many devices.
Conditions that affect mAh performance include temperature and usage patterns. For instance, high temperatures can decrease battery lifespan and effective charge capacity. Using a battery steadily at high discharge rates can also lower its effective capacity. In practical application, a drone using a high mAh battery will fly longer than one with a lower rating, assuming all other factors are equal.
What Features Should You Prioritize in High-Capacity LiPo Batteries?
To prioritize features in high-capacity LiPo batteries, you should focus on energy density, discharge rate, cycle life, and safety features.
- Energy Density
- Discharge Rate
- Cycle Life
- Safety Features
Understanding these attributes can guide your decision-making process when selecting a LiPo battery for specific applications.
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Energy Density: High-capacity LiPo batteries excel in energy density, which refers to the amount of energy stored per unit weight or volume. A battery with a higher energy density can provide more power for a longer time without increasing the size or weight. For instance, recent advancements have led to energy densities above 250 Wh/kg in quality LiPo batteries. This feature is crucial for applications like drones and electric vehicles where weight and space are critical.
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Discharge Rate: The discharge rate is a measure of how quickly a battery can deliver stored energy. It is often expressed in terms of the “C” rating. A battery with a higher C rating can provide bursts of power for short durations. For example, a 30C battery can theoretically deliver 30 times its capacity in amperes. High discharge rates are essential for applications like RC cars and racing drones that require swift acceleration and power bursts.
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Cycle Life: Cycle life indicates how many charge and discharge cycles a battery can undergo before its capacity significantly diminishes. High-capacity LiPo batteries typically have a cycle life ranging from 200 to 500 cycles. This longevity translates to reduced long-term costs and better performance in devices requiring frequent charging. Users should assess their specific usage to choose a battery that meets their cycle life needs.
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Safety Features: Safety features include protection against overcharging, discharging, and short-circuiting. LiPo batteries can be volatile if not handled correctly. Many high-capacity batteries now incorporate features such as built-in battery management systems (BMS) to monitor voltage and temperature. For instance, the development of flame-retardant materials in battery construction has improved overall safety, appealing to many consumers concerned about the inherent risks associated with LiPo technology.
Which Are the Best Rectangle Shaped LiPo Batteries Available on the Market?
The best rectangle-shaped LiPo batteries with the highest milliamp hour (mAh) capacity on the market include several popular options.
- Turnigy Graphene 3S 5000mAh
- Gens Ace 3S 5000mAh
- Venom 3S 5000mAh
- Tattu 3S 5200mAh
- Zippy Flightmax 3S 5000mAh
These options vary in terms of discharge rates, weight, and application suitability.
Each rectangle-shaped LiPo battery listed offers unique attributes.
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Turnigy Graphene 3S 5000mAh: The Turnigy Graphene battery features advanced graphene technology, which enhances performance. Graphene allows for better heat dissipation and higher discharge rates. As a result, users can enjoy increased efficiency and longevity.
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Gens Ace 3S 5000mAh: The Gens Ace battery is known for its consistent discharge performance. It has a stable voltage characteristic, which provides reliable power over time. Many users choose it for both racing and regular drone flights due to its reliability.
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Venom 3S 5000mAh: The Venom battery offers a good balance between cost and performance. It is designed for multiple applications, making it versatile. Its unique thermal management design helps maintain optimal operating temperatures.
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Tattu 3S 5200mAh: The Tattu battery provides slightly more capacity at 5200mAh. Enhanced capacity ensures longer flight times, making it a favorite among enthusiasts. Users report its strong performance in high-demand scenarios.
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Zippy Flightmax 3S 5000mAh: The Zippy Flightmax battery is popular for its value. It offers decent performance at a lower price point, making it accessible for beginners. However, some users note that its lifespan may not match higher-end options.
These batteries cater to various preferences, from price sensitivity to performance needs.
What Factors Should You Consider for Safe Use of LiPo Batteries?
The factors to consider for safe use of LiPo batteries include handling practices, storage conditions, charging methods, and device compatibility.
- Handling Practices
- Storage Conditions
- Charging Methods
- Device Compatibility
Understanding these factors ensures the safe handling and operation of LiPo batteries, which are sensitive to misuse and environmental conditions.
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Handling Practices:
Handling practices involve the safe management of LiPo batteries during everyday use. Users should always inspect batteries for physical damage, such as swelling or punctures, before use. If a battery appears damaged, it should be disposed of properly. It’s essential to use appropriate connectors and avoid short-circuiting the terminals. According to a study by LiPo Safety Organization, mishandling is a primary cause of battery fires. -
Storage Conditions:
Storage conditions refer to the environment in which LiPo batteries are kept when not in use. LiPo batteries should be stored in a cool, dry place, ideally at room temperature. The optimal storage voltage is typically around 3.8V per cell. Storing batteries fully charged or fully discharged can lead to capacity loss or safety risks. The CPSC reports that improper storage can increase the risk of fire and chemical leaks. -
Charging Methods:
Charging methods are crucial in maintaining battery health and safety. Users should always use a suitable LiPo charger that matches the battery specifications. Overcharging or charging at excessive rates can lead to thermal runaway, a condition where the battery overheats and may catch fire. Following manufacturer guidelines for charging cycles is vital for safety. The National Fire Protection Association emphasizes the importance of following these standards to prevent accidents. -
Device Compatibility:
Device compatibility involves ensuring that the battery fits the requirements of the device it powers. Using improperly sized or incompatible batteries can lead to device malfunction or battery failure. It’s important to consider the voltage, capacity, and physical dimensions of the battery in relation to the device. A proper fit reduces the risk of accidents and enhances performance. Various studies, including one by the Battery Safety Institute, highlight the risks associated with mismatched battery specifications.
How Can You Properly Charge and Maintain Your LiPo Batteries for Longevity?
Properly charging and maintaining LiPo batteries requires adherence to specific guidelines to ensure their longevity and performance. Key practices include using a compatible charger, monitoring voltage levels, and storing batteries correctly.
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Use a compatible charger: Always charge LiPo batteries with a charger designed for LiPo technology. These chargers help maintain the battery’s health by providing the correct voltage and current. An inappropriate charger can lead to damage or even fire hazards.
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Monitor voltage levels: Regularly check the voltage of individual cells within the battery. Ideally, each cell should have a voltage between 3.2V and 4.2V. Discharging below 3.0V can significantly shorten the battery’s lifespan (Mason, 2021).
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Charge at a safe rate: Charge LiPo batteries at a rate of 1C or less. For example, if a battery has a capacity of 1000mAh, the charging current should not exceed 1000mA. Charging at lower rates can also enhance battery life.
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Balance the cells: If your charger supports it, use the balance charging feature. This ensures all cells within the battery get charged equally, preventing issues caused by uneven charging and extending the overall lifespan of the battery (Smith, 2020).
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Store batteries properly: Store LiPo batteries at 3.7V to 3.85V per cell for long-term storage. This voltage range protects the battery from damage while not in use. Always keep them in a cool, dry place away from direct sunlight.
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Avoid extreme temperatures: LiPo batteries perform best between 20°C and 25°C (68°F to 77°F). Keeping them outside this range can reduce capacity and lifespan. Extreme temperatures can also increase the risk of battery failure.
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Inspect for damage: Regularly check for physical damages such as puffing or swelling. If any issues are detected, discontinue use and dispose of the battery safely.
By following these practices, users can maximize the performance and lifespan of their LiPo batteries, ensuring safe usage and prolonged reliability.
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