Titan Brand-PMNN4066 Battery for Motorola MotoTRBO XPR6500 XPR6550 XPR6580 Smart 18 mth war Brand New | Li-ion | 7.4 Volts | 2000 mAh | Black Smart compatible tested to match and/or exceed OEM specs. 18 Month Warranty Replacement Part #: Motorola PMNN4065, PMNN4066, PMNN4066A