Apparantly you need a 1 amp charging block from another company to charge the batteries and to see if you can get them to 100%. I wish tacticam would disclose this clearly to the consumer before purchase.
The lithium battery is the way to go! The charge lasts a long time and beats not having to carry extra batteries, plus the cost savings is exponential after purchasing the lithium cartridge.
These are super handy to have instead of changing batteries constantly. It especially comes in handy so you don’t have to drop your batteries all over the ground trying to change them.