Board Thread:General Nerf discussion/@comment-35070608-20180816041114/@comment-27306930-20180816155355

In general, unless you know the specs on your batteries, no, don't combine different battery types. But yes, it's fairly safe to combine AA size LiFePO and IMRs. Remember, they have different chargers. Those are not interchangeable.

'''EDIT: Don't mix unprotected lithium batteries ! Each type has a slightly different minimum discharge voltage, so mixing unprotected cells can be unpredictable. Thermal runaway could occur in one or more cells as they are discharging. '''

'''Protected lithium batteries on the other hand, are quite safe. Each cell monitors its voltage, current, and temperature. If any of those approach dangerous levels, the battery will shut down. Unfortunately, that means your blaster will just die, presumably at the worst possible moment''' 😒

As to the battery slots, 14500 IMRs are the same size as AA batteries. The RapidStrike uses C cells. So you need some of those AA to C converter shells. They are just hollow plastic tubes that make AAs the same size as Cs. They work great.