NiCd 1100mAh AA battery with solder tabs for battery packs. These AA NiCad batteries have a high mAh rating for a longer service period between charges.
It is safe to replace lower capacity cells with higher ones to give better performance - a longer charge time is usual but check with your device manual first to make sure.
With tags (extra) they are easily soldered together with any normal electronics soldering iron.
Nominal capacity - 1100 mAh.