Varstrom Hailong Downtube E-Bike Battery Pack (48V / 52V 20Ah)
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Includes all key accessories and simple setup instructions for quick start!
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Expected arrival within 12–15 days
The Varstrom Hailong 48V/52V 20Ah Downtube E-Bike Battery is a high-performance power solution built for electric bike conversions and mid-drive motor upgrades. Powered by high-density 21700 lithium-ion cells, it offers longer range, better thermal stability, and higher discharge efficiency compared to standard 18650 cells. The integrated 40A Smart BMS ensures maximum safety by protecting against overcharging, deep discharge, overcurrent, and short circuits. Featuring a quick-release Hailong downtube mounting system, integrated safety lock, and USB charging port, this battery is fully compatible with popular mid-drive systems like Bafang BBS02 and Tongsheng TSDZ8.
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Brand: Varstrom
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Case Type: Hailong Downtube Mount
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Voltage Options: 48V / 52V
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Capacity: 20Ah
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Battery Cell Type: Premium 21700 Lithium-ion Cells
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BMS Rating: Built-in 40A Smart BMS
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Motor Compatibility: 250W - 1200W Motors (Bafang BBS02, Tongsheng TSDZ8, Hub Motors)
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Discharge Port: XT60 / Anderson (Plug-and-Play)
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Lock & Key: Anti-theft Security Lock with Keys
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USB Output: Integrated 5V USB Charging Port for Mobile Devices
Customer Reviews
Thank you guys for your work, i hope this battery is as great as the last one. fast delivery, high-level customer responsiveness, wonderful varstrom team!!! 5 stars!
Battery is working well, gives the bike a good range. the charger gets very hot (over 70c) so i rest it on some aluminium plate when i use it. it would benefit having a fan.
Battery cells are not samsung as advertised
Ordered tuesday evening and it arrived thursday morning, seems to be excellent quality and a good price.
Battery pack works well with my 2000w in hub motor, the bsm limiter works well enough so far, comes with mounting brackets but they don't work with my style of bike so is what it is. comes with a 5 ampcharger so it's fast enough, beats my 2.5 amp charger i had before but it takes a hot minute to charge fully, do recommend getting a 10amp charger from a third part but if your not using it for constant use the included charge works well enough. the construction is sturdy enough and comes with x69 connectors for battery to controler just make sure you have an extra set of line connectors if you don't already have a down line connection