Eurorau Flash Extra Battery 52V21Ah 52V17Ah

EUNORAU Flash 52V Replacement Batteries — 21Ah Down?Tube & 17Ah Hailong

Overview

Two 52V lithium battery options made for the Eunorau Flash: a high-capacity 21Ah down?tube pack (HYFX?D LG3500) for longer rides, and a lighter 17Ah Hailong top?tube pack for a lower-weight setup. Both include a 4A charger and an integrated battery management system that balances cells and protects the pack for dependable daily use.

Benefits

• Ride farther between charges so you can cover longer commutes and weekend routes without stopping for a recharge.
• Charge less often — higher capacity reduces how frequently you need to plug in during a typical week.
• Charge and ride with more confidence thanks to built-in BMS protections that reduce the risk of damage.
• Choose the battery shape that fits your bike and riding preferences: down?tube for maximum range or Hailong top?tube for lower weight and a cleaner frame look.
• Simpler upkeep — cell balancing and stable charging help keep performance consistent over time.

Features

• 52V nominal voltage for consistent power delivery compatible with the Eunorau Flash.
• Two form factors: HYFX?D LG3500 down?tube pack (21Ah) and Hailong top?tube pack (17Ah).
• Integrated BMS with short?circuit, over?charge, over?discharge and over?current protection plus cell balancing.
• Includes a 4A charger for standard charging routines.
• Durable black finish designed to match the bike’s styling.
• Designed for straightforward installation and everyday use on the Eunorau Flash.

Specifications

• Compatibility: Eunorau Flash (https://eunorau-ebike.com/products/flash)
• Battery A — HYFX?D LG3500 (Down?tube)
  • Model: 52V 21Ah lithium?ion eBike battery
  • Nominal Voltage: 52V
  • Rated Capacity: 21Ah
  • Weight: 13.9 lbs
  • Standard Charge Current: 4A
  • Charger: 4A charger included
  • Type: Down?tube battery
  • Color: Black
  • Cycle Life: 500–800 cycles
  • BMS & Balance: short?circuit protection, over?charge protection, over?discharge protection, over?current protection, cell balancing
• Battery B — Hailong (Top?tube)
  • Model: 52V 17Ah lithium?ion eBike battery
  • Nominal Voltage: 52V
  • Rated Capacity: 17Ah
  • Weight: 10.5 lbs
  • Standard Charge Current: 4A
  • Charger: 4A charger included
  • Type: Top?tube (Hailong) battery
  • Color: Black
  • Cycle Life: 500–800 cycles
  • BMS & Balance: short?circuit protection, over?charge protection, over?discharge protection, over?current protection, cell balancing