... ruggedness. 5.Undergone comprehensive testing including high altitude performance, vibration, mechanical shock, thermal cycling, external short circuit and overcharge test simulations. 6 ... , PT558KB-33L fits Kirisun PT3300, PT3800, PT3500 High quality Li-ion Battery For ICOM BP-265, IC-F3001, IC-F4001, IC-S70, IC-V80, IC-T70A, IC-T70E