Types of BB Batteries

Handy Reference Chart:

OEM batteries by series
71XX – Dark blue (C-S2) – 1000mAh

81XX – Gold/yellow (C-M2) – 1400mAh

83XX – Dark blue (C-S2) – 1000mAh

87XX – Dark Blue (C-S2) – 1000mAh

88XX – Green (lime) (C-X2) – 900mAh