Standard shape is Flat (4 cells side by side), square is shown in photo. Stick packs may also be constructed, however they are not repairable if a cell is damaged.

Use only Lithium chargers with an A123/LithiumWerks mode limiting charge voltage to 3.6V per cell. An Astro Blinky for A123/LithiumWerks is highly recommended as a balancing aid for these cells.

Specification's: Weight of built 4S 2500 RX pack is 11.72oz/(332g). See A123/LithiumWerks 2500 Single Cells Above for all other available data.

Want a custom pack? See our custom pack listings, or email us at Sales@RadicalRC.com, we can special make any kind of pack you require!

Note: Photo shows sample Rx pack with double lead option.

For checking pack voltage between flights, our best advice currently is: Leave model on after flight, plug loaded volt meter directly into pack balance plug (charge port OK but not preferred) hold load engaged, switch model off. Allow pack to drain into meter for 5 seconds, take your reading. See my blog post Checking A123 RX Packs For Recharge Point for help in this area.