That always depends on the device you intend to get. Penguin often sells batteries for specific electronic gear(like Tarantula or Minimax) but does not carry easy to find AA and AAA batteries. If you get a device with an odd battery size that Penguin does not carry then Amazon.com is a surprisingly great place to search. They have a great selection of different battery types.
Answered at 10:40am on June 17th, 2014 by eostresh (191 karma)