Amstron interchangeable drop-in inserts for the 6 bank universal chargers. These inserts are designed for OEM battery part numbers NTN7143, NTN7144M WPNN4013, NTN8294, NTN8299 . For use with Motorola HT1000, GP900, GP1200, JT1000, MOBIUS, MT2000, MTS2000, MTX8000, MTX9000 and MTZ2000