Same functions of Retevis RB27 and Midland GXT1000VP4
Amazon.com: Synergy Digital 2-Way Radio Battery, Compatible with Midland XT50 2-Way Radio, (Ni-MH, 3.6V, 700mAh) Ultra High Capacity, Replacement for Midland AVP14 Battery : Electronics
Amazon.com: Midland® – AVP17 Rechargeable Battery Packs for Midland® GXT1000, GXT1030, GXT1050, T290 and T295 : Electronics
Amazon.com: Midland AVP17 Rechargeable Battery Packs XT511, T290, T295 and GXT Series GMRS Radios (4-Pack) : Electronics