"Cobra AA, Features: Voltage: 1.2v, Composition: NiMH, Replacement Battery For The Following CXT345 CXT390 CXT545"
Nickel Metal Hydride batteries have a higher energy capacity and don't contain toxic heavy metals like the Ni-Cd batteries. These AA's have a capacity of 1800mA and under normal conditions should provide well over 500 cycles, maybe 1000. They should last you years of service. They also do not have the ""memory effect"" problem that Ni-Cd's have, meaning they can be charged anytime without worrying about discharging them fully. So, to repeat, these batteries are: Environmentally ""cleaner"" than Ni-Cd's. No toxic Cadmium, Mercury, Lithium or Lead. Higher capacity. Battery performance (run-time of devices) is up to 100 greater than Ni-Cd's of same size. No memory effect. Very simple, easier to use and charge. Rapid charging capability. Can be recharged in as little as 1.5 hours."