18650 Samsung SDI cell to replace smartphone battery
I have 3 18650 in my galaxy s4 mini with cyanogen 14 android version 6.0.1, use mine as a normal phone as wlell as an ap at home as its faster internet at up to 65 meg, works a treat and charges fine but had to add a charging pcb that also doubles as a USB power sorce, was from a pound shop portable mobile charger.had to add a switch between battery's and phone to turn it off fully to reset the phones battery meter as does not recognise when its fully charge. Lasts a couple of days with normal use. All in all very pleased with results so far. About 4 months.