Motorola 53871: This 53871 is a Replacement for the Motorola Original 53871. 4.8 Volts, 1500mAh NiMH. Part #53871 is now known as NNTN4190A. The 53871 Battery may have also been known as NTN8971, NNTN4190, NNTN4190A. This battery Fits Radio Models: CP100, i500, i500+, i550, i550+, i700, i700+, XTN Series, XU1100, XU2100, XU2600, XV1100, XV2100, XV2600, and some Nextel Phones.
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XTN Series Batteries
Motorola i700 Batteries
Nextel i550 Batteries