The rechargeable AVP7 NiMH Extra Battery Packs work with the GXT 600, "Bubba" 661, 650, 710, "Bubba" 771, 750, "Bubba" 881 and 850.
Reviewed by 1 customers
The replacement batteries are exactly the same as the original factory batteries - look, fit, and finish are great. The battery packaging mentions even more models that the batteries are compatible with - for example, I have the GTX 1050 radios, and the details online for these replacement batteries only mention radios up to the GTX1000. I bought them anyway with fingers crossed, and they are perfect. Have charged them and used the radios a few times - limited use calling/transmitting, but on standby waiting for a call they lasted 12+ hours and were still going.