Replacement battery for GP688. Specifications: 1100mAh, 7.5V, Nickel. Compatible with: GP688, SPIRIT SU42, SPIRIT SV52, GP-688. Replaces: Motorola PMNN4000C, Motorola PMNN-4000C, Motorola PMMN4013, Motorola PMNN4000A, Motorola PMN4000B, Motorola PMNN4000B and 5 more. Motorola replacement battery designed for Two-Way Radio devices. Fits like the original manufacturer part.