I bought my
batteries. Local store called BatteriesPlus. They are the CR123A variety, 3V .. The way the rudest salesman on the planet explained it to me is that the CR123A
batteries, the ones that are NOT chargeable, are 3.7V .. the chargeable CR123A batteries are 3V .. why ?? I don't know but the package says ULCR123RK 3V rechargeable SIZE 123 blah blah ..
The charger is called a 'smart charger' with auto shut-off and LED charge indicator .. [that I shouldn't take in the bathtub with me ... ]
I got 2 batteries plus a 2 battery charger for approx $30 .. Batteries and charger have a 3 year warranty and a 1 year 'in store' warranty.
If I did something wrong .. I can take them back --- the packages are still unopened.