The Overlander 5300mAh 11.1V 3S 65C Hard Case Sport Track LiPo Battery (EC5) – 3143 is a premium power solution built for racers and RC enthusiasts demanding uncompromising performance, durability, and reliability.
Why choose the Overlander 3143?
Encased in a protective hard shell and built using precision-matched Fullymax cells, this 5300mAh 65C LiPo provides consistent power delivery and rugged resilience—perfect for competitive RC car racing and high-demand off-road bashing. With its high discharge rates and durable construction, it’s engineered to perform under pressure.
Key inclusions in the pack
- 1 × Overlander 5300mAh 11.1V 3S LiPo battery in reinforced hard case
- Pre-installed EC5 connector for high-current applications
- 10 AWG silicone wire leads and JST-XH balance plug
Performance & output
Delivering a continuous 65C discharge rate (344.5A) and a burst rating of up to 120C (636A), this pack is designed to handle extreme loads without voltage sag. Its 5300mAh capacity ensures long run times, while the 3S (11.1V) format is ideal for 1/10 and 1/8 scale RC cars, trucks, and buggies requiring sustained power output.
Hard case durability
The tough ABS hard case protects against physical impacts, track debris, and handling stress, making it perfect for competitive environments where crashes and collisions are inevitable. This added security also prolongs cell life and keeps the pack structurally intact.
Fullymax precision cells
Overlander’s partnership with Fullymax ensures that each cell is matched by voltage, resistance, and weight. The result is smoother discharges, reduced heat buildup, and extended cycle life—giving you consistent performance run after run.
Connector & compatibility
The EC5 connector supports high-current applications, reducing resistance and heating during heavy use. This makes it ideal for powerful brushless motor setups and high-demand ESCs. Alternative connector versions (Deans, XT90, Traxxas) are also available in the same battery format for platform compatibility.
BRCA-approved assurance
The 3143 battery is part of Overlander’s BRCA-approved Sport Track range, trusted by competitive drivers across the UK. This certification ensures it meets standards for race performance and safety compliance at official events.
Dimensions & weight
Measuring approximately 139 × 47 × 47 mm and weighing around 450 g, this pack balances capacity and power output with a form factor that fits snugly into most 1/10 and 1/8 RC chassis trays.
Best use cases
- RC car racing—delivering bursts of acceleration and sustained top speeds
- 1/8 buggies and truggies—rugged enough for off-road competition
- 1/10 scale drift and touring cars—powerful, smooth discharges
- High-demand brushless motor builds requiring 65C continuous output
Care & maintenance tips
- Always charge with a quality balance charger designed for LiPo packs
- Store at 3.8V per cell when not in use to extend pack life
- Check for puffing or swelling before and after runs—replace if damaged
- Secure the battery firmly in the tray to prevent movement during impact
User impressions
Enthusiasts praise this pack for its ability to maintain punch throughout entire races. Many highlight that even under heavy brushless loads, the pack remains cool and provides reliable voltage without drop-off. The hard case is frequently mentioned as an advantage in protecting the investment during high-impact use.
Benefits summary
- 65C continuous / 120C burst discharge—race-proven power
- 5300mAh capacity for long run times
- EC5 connector ensures efficient high-current delivery
- Durable hard case protects against track impacts
- Matched Fullymax cells for consistent discharge and long cycle life
- BRCA-approved for competitive assurance
Final thoughts
The Overlander 3143 5300mAh 11.1V 3S 65C Hard Case Sport Track LiPo Battery with EC5 connector is a powerhouse designed for serious RC drivers. Offering durability, race-level discharge rates, and dependable performance, it’s the go-to pack when reliability and speed matter most—buy 3143 today.
Brand, Model & Product Type
- Brand: Overlander
- Model: 3143 (EC5 version)
- Product Type: 5300mAh 11.1V 3S 65C Hard Case Sport Track LiPo Battery
Electrical Characteristics
- Capacity: 5300mAh
- Voltage: 11.1V (3S)
- Continuous Discharge: 65C (344.5A)
- Burst Discharge: 120C (636A)
- Energy: 58.8 Wh
Construction & Dimensions
- Case: Reinforced ABS hard case for durability
- Dimensions: ~139 × 47 × 47 mm
- Weight: ~450 g
Connectors
- Main Connector: EC5
- Balance Connector: JST-XH
- Wire Gauge: 10 AWG silicone insulated
Cell Quality & Certification
- Cells: Fullymax, voltage/resistance/weight matched
- Range: Sport Track series
- Approval: BRCA certified
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
