Rewrap Kraken 25R



Beast "Pride your power" batteries were created by Battery Bro to raise the bar for what an 18650 can be. These are the first "art batteries" created, with help from artist Frank Teran. Frank has been a lead artist in games like Star Wars and Deus Ex

The Kraken batteries are rewrapped Grade A Samsung 25R (blue) batteries. These original 25R batteries can not be bought anywhere else, and these are truly the last of their kind as all newer 25R batteries have been replaced by the 25R5 (green).

While the specifications of both cells are the same, many users swear by their old 25R (blue) "smurf" cells - and after these are sold there won't be anymore. It is truly a one-of-a-kind cell.

Read more about what goes into a BEAST cell on its official website here.

Battery specifications:

  • Limited Edition "Art Battery"
  • Model: Samsung 25R (original, blue)
  • Max. continuous discharge current: 20A
  • Nominal capacity: 2500mAh
  • Nominal voltage: 3.6V
  • Discharge end voltage: 2.5V
  • Charging voltage: 4.20 +/- 0.05V
  • Standard charging current: 1.25A
  • Length: 66.00 mm
  • Diameter: 18.50 mm
  • Weight: 45.0 g

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Never worry about quality when buying from Battery Bro. We make sure you have the latest, greatest cutting-edge batteries, every time. 


18650 batteries are commodity cells, and as a wholesaler we understand how important price is to your bottom-line. As such, we offer international shipping directly from Asia to save money at higher quantities.



  • Ship from our California warehouse by choosing the USPS option, anywhere to 48 states in 3-5 days
  • We ship worldwide! Learn more about our new PostNL 30-day shipping option for low quantity orders offered direct from our Asia warehouse


  • We offer 5-7 (typical) working day air shipping to anywhere in the world
  • For medium to large orders we may recommend sea freight
  • For orders above 50 QTY we also offer premium Battery Bro splash-proof cases

With Battery Bro, we take care of customs clearance, international or domestic shipping to your door.

21-day full refund

Full 21-day refund on all orders. Buy our products, and if you're not satisfied, you get your money back.

Quality guarantee

Battery Bro takes several measures to make sure your batteries are of the highest quality:

  • We only deal with manufacturers or authorized distributors
  • We inspect every battery and do our own testing
  • We track each battery case with a unique authenticity code

In Asia, 18650 batteries are binned by quality into A, B, and lower bins. C-bin batteries are often recycled from battery packs. Lower bin batteries will underperform and may be dangerous.

Battery Bro guarantees that all our batteries are Grade A. 

Download the official Data Sheets:

Introduction of INR18650-25R

INR18650-25R Cell Specifications

Blog post(s) about the 25R:

Amazing Batteries Part 2: Samsung 25R