It work as described. the LED is able to tell the battery is charging or not, full or almost full. it's simple and good to keep battery for car that doesn't use much.I use it to keep my weekend van battery charge. If battery is empty, this will takes a long time to charge up, since it only has 0.5AMP.
Keep Your Battery Fully Charged With A Smart 12V Charger/Maintainer Featuring Winter Mode
28 Review
Efficient Charging With LST 7 Stages 5A Battery Charger - 3.3A 12V For Ultimate Performance
35 Review
Case Compatible With Halo Bolt Portable Car Battery Jump Starter 58830/44400/57720 MWh Charger. Power Bank Holder For Halo Power Station 100/For AC Outlet.(Not Fits For Halo Bolt Air, Box Only)
24 Review
Xiaomi 70mai Jump Starter Midrive PS01
120 Review