Pocket Rocket II 52v 8ah Samsung 40T Lithium ion E-Bike Battery

Original price was: $449.99.Current price is: $374.99.

The Pocket Rocket II is a Mega 52v Lithium Battery for your Electric Bike.

It is the best bang for your buck for mini packs, as it’s packed with 8 Amp hours!

Read full description for details on this lovely Ebike Battery.



UPGRADE OFFER: 52v Charger ($69.99 Value) *

This limited-time offer is valid for any 52v battery pack order.


This Ebike Battery is built with cutting-edge Samsung 40T 21700 cells. Not much bigger than a Samsung 30q pack with almost 35% more capacity!!

Please read the full description and ask any questions you may have before making a purchase. NOTE: Lithium ion batteries can be dangerous, please consult a professional if you are unsure.


* 52v = more power on a 48v system. Safe and simple power upgrade!


* Small and Light (under 5 pounds!)

* Awesome battery made of top quality components.

* 14s2p – 28 Genuine First Grade Samsung 40T 21700 cells

* 45 amp continuous 100amp maximum BMS

* Temperature Protected.

* Ling XT-90s lead wire connector. NO SPARKS!

* XT60 lead for charger

* Weight of Battery: Under 5 pounds

* Life Span: 400-1000 charges

* All Battery Packs are shipped in the order it is received. Please allow 2-10 days to ship. Tracking will be sent as soon as it ships. Contact us if you need assistance.

More Highlights:

1. 52 volts – The ultimate secret weapon for your 48 volt system. Compatible with 48 volt motors and controllers – plug and play. You’ll enjoy more power while gaining more range. It’s win-win!!

2. 8 amp hours translates to 416 watt hours.

3. The more pedal assist (pedals assisting) – the longer the battery will last on a ride.

4. Our 14s 45amp continuous BMS with temperature protection will ensure stability within the battery pack and keep all 28 cells juiced up properly.

5. This 52v pack is built with a tight frame for better heat dissipation. Having too much empty air space actually acts as an insulator – trapping the heat inside the pack (think double-pane windows). Connections are made with solid Nickel strips, spot welder to each cell. Each cell and each series is tested before assembly. The BMS will prevent over charging and will balance the cells after a full charge. It basically makes your battery as safe and as efficient as possible.

NOTE: Please note: pocket sizes vary. May not fit all pockets.


  • With all rechargeable batteries, please take great care when charging. Never, ever short out the battery in any way. Failure to safely use this battery can result in fire, explosions, destruction, loss of life, loss of marriage, bad burns and an upset stomach.
  • ONLY CHARGE THIS BATTERY IN A PLACE WHERE YOU WOULDN’T MIND STARTING A FIRE. NEVER LEAVE A CHARGING BATTERY HOME ALONE. Some people put their battery and charger in a BBQ grill with the lid on so that if anything bad happens it would be contained. There are also ammo-boxes and safe, metal boxes for charging battery packs. Basically, use your head.
  • Charge this pack ONLY with the appropriate lithium ion charger.  If you aren’t sure which charger you should use please co tact us to verify.
  • Do not open or remove any part of this battery pack.  Do not modify the pack in any way – including cutting wires, using connectors that are not compatible with the pack, hard-wiring the pack into a motor or controller, etc.  ANY modification of this pack will void any and all warranty, either implied or expressed.
  • If this pack is damaged or gets wet do not use it Danger of fire or thermal runaway of cells can occur, and this can be a life threatening issue.  Dispose of a damaged or wet pack immediately by contacting your local hazardous waste disposal office.



All E-Bike Battery Packs are shipped in the order it is received. Please allow 5-10 days to ship. Tracking will be sent as soon as it ships. Contact us if you need assistance.

Additional information

Weight 4 lbs
Dimensions 6 × 4 × 3 in



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