Originally Posted By: RNewcomb
I learned the hard way about 10 years ago about keeping those Emergency Jumpers plugged in and charged - I had one that I hadn't plugged in for about a year, and when I needed it, it didn't work. I've read you need to top them off every 30 days or so.


The ones I have from Costco state in their directions to charge them immediately after use and at least every thirty days. I have a Monthly Battery Maintenance Procedure where they both get charged, along with the emergency cellphone chargers and the ham radio HTs. Quarterly I rotate and recharge the battery in my shotgun's weaponlight along with any unused Eneloops. Stuff that's being used gets charged more often as appropriate.