I had the same problem this year. I own 2. One 2 years old and one 3. Yhe newest one. The 120v charger plug never fit in the hole correctly. Had to wrap it around the charger to get it to charge. Both..
Purchased three Redfuel SL1 jump packs 2 years ago. Removed from vehicles (5Nov2019) to recharge before winter weather sets in (Middle Georgia) and two packs had swollen batteries that separated the p..