I"m not sure WHY you'd leave your PERSONAL property in a PUBLIC USE item/site [charge node] & expect it to stay there.
Charge them - take them - move on to the next charge node - repeat.
Or, chase the glowbugs and charge the batteries 1 at a time.
If you kill the glowbug before it runs off and warns/scares the others off - you can get several batteries done quickly.
And it's a whimsical/fun way to spend the time on an otherwise boring task. lol
**edit** It is commendable that you'd want to help your community. It just seems you are only helping those that find your kind-freebies.