Many thanks to Gerry KG8HZ who notes that Bioenno has now added a 3 Amp Car Charger to their product line.
Click here to view at Bioenno.
This charger would allow you to safely charge your 12V LiFePo batteries from a 12V source. This could come in very handy for mobile POTA and SOTA operators who activate multiple site in short order. RVers will also find this accessory useful since it’s DC powered. The price is $99.99 which is a bit steep, but then again Bioenno products tend to be very high quality.