I don't know the first thing about
batteries, but I was looking on
CR123A Batteries CR123 Batteries CR123A Battery CR123 Battery and found the following info. Sounds like this could explain the problem. If not, sorry for the dumb post; just trying to be helpful.
Rechargeable CR123A
Rechargeable Li-Ion 3.6V 900mAh CR123A battery with short-circuit and low voltage protection circuit board.
RCR-123A battery $9.00 Add to Cart
These may not be compatible with other chargers or other RCR123A
batteries.
NOTE: These top off at 4.2V so watch the voltage and the device you are using them in. We do NOT recommend them for use in incandescent lights or multi-cell applications. MORE instructions below
The Charger: The BC-RCR-123A charger will charge one or two batteries at a time. The batteries do not have to be taken out of the charger when fully charged as they will just float charge at that point. The charge indicator will turn from red to green as the battery or batteries charge. These batteries have no memory effects and do not need to be cycled so the more you charge them the happier they are. The wall adaptor is made for domestic 120VAC voltage. The service life of the battery will be improved if the battery is not discharged all the way on a regular basis.
The Batteries: The RCR-123A battery has proven to work best in single cell applications; especially single cell LED flashlights. This battery has a safety circuit which protects it against overloads, short circuits, etc. When used in series, the batteries sometimes will "open" or go to the fault condition as they think there is a problem. The more closely balanced or evenly charged they are, the easier it is to use them in series. Keep in mind that they are protected but not regulated, so you are dealing with a battery that will reach about 4.2V coming right off the charger if fully charged. This voltage can be harmful to incandescent lights. We do not recommend their use in incandescent flashlights due to the higher voltage of the battery.
We opted to stick with the unregulated version because the regulated ones thus far have been much lower capacity and the regulator portion of the battery has not been able to withstand very heavy current. It would short out and you would end up with an unregulated battery anyway at half the capacity of the non-regulated one. We figured it better to just start out with the non-regulated one but be careful about the 3.6V (4.2V hot off charger) higher voltage. These cells are protected with a low voltage cutoff of about 2.5V.
If you happen to get one of them to trip to the "open" or fault condition, it will reset. You can simply place it in the charger over night and it will reset and begin charging as though all was normal. We have found a few other chargers that this battery will work in but cannot guarantee that your existing charger will work and cannot recommend you using different chargers.