6 volt holders
ABH1/2AA
BH1/2AA-3
815-0931
BH223L
typical battery part number
PX28L, K28L, V28PXL, 2CR1/3N, L544, 4LR44
PX28L, K28L, V28PXL, 2CR1/3N, L544, 4LR44
PX28L, K28L, V28PXL, 2CR1/3N, L544, 4LR44
EL223AP, CRP2, K223LA, PC223A, RL223A

12 volt holders typical BH23AL
BH23APC
BH23AW
BH223-X2-W
BH223-X2-411

battery part number
23A, MN21, KE23A, GP23A
23A, MN21, KE23A, GP23A
23A, MN21, KE23A, GP23A
Holds two 6 volt batteries: CRP2, DL223, RL223A
Holds two 6 volt batteries: CRP2, DL223, RL223A