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Description
xEunorau | Flash Extra Battery 52V21Ah (2nd) | 52V17Ah (3rd) | Both
Overview
Two reliable lithium-ion battery options designed for the Eunorau Flash: a higher-capacity 52V 21Ah down-tube pack using HYFX-D LG3500 cells and a lighter 52V 17Ah Hailong top-tube pack. Both include a 4A charger and an integrated battery management system (BMS) for safer, balanced charging and riding.
Benefits
- Extend your ride — higher capacity means fewer stops to recharge and longer range per charge.
- Less worry about battery health — built-in BMS protects against short circuit, over-charge, over-discharge and over-current.
- Choose the right balance of weight and range — pick the 21Ah down-tube for maximum distance or the 17Ah top-tube for a lighter bike.
- Simpler charging — standard 4A charger for routine, predictable recharging times.
- More dependable rides on hills and longer trips thanks to consistent power delivery and cell balancing.
Features
- Compatibility: Designed to work with the Eunorau Flash e-bike.
- Two form factors: down-tube battery (21Ah) and top-tube Hailong battery (17Ah).
- Integrated BMS with cell balancing for safety and longevity.
- Includes a 4A charger for standard charging.
- Durable black finish that matches the bike’s aesthetics.
- Cycle life rated at approximately 500–800 cycles under normal usage.
Specifications
- Compatibility:
- Eunorau Flash — https://eunorau-ebike.com/products/flash
- 52V 21Ah HYFX-D (LG3500) — Down-tube battery
- Model: 52V21Ah lithium ion e-bike battery (HYFX-D LG3500)
- Nominal Voltage: 52V
- Rated Capacity: 21Ah
- Weight: 13.9 lbs (?6.3 kg)
- Standard Charge Current: 4A
- Type: Down-tube battery
- Color: Black
- Cycle Life: 500–800 cycles
- Charger: 4A charger included
- BMS & Balance: Short-circuit protection, over-charge protection, over-discharge protection, over-current protection, cell balancing
- 52V 17Ah Hailong — Top-tube battery
- Model: 52V17Ah lithium ion e-bike battery (Hailong)
- Nominal Voltage: 52V
- Rated Capacity: 17Ah
- Weight: 10.5 lbs (?4.8 kg)
- Standard Charge Current: 4A
- Type: Top-tube (Hailong) battery
- Color: Black
- Cycle Life: 500–800 cycles
- Charger: 4A charger included
- BMS & Balance: Short-circuit protection, over-charge protection, over-discharge protection, over-current protection, cell balancing
- --- This Variant ---
- Battery Capacity: Second 21AH Battery
Additional Information
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Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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