I’ve been looking at various Xtar chargers for on and off-grid use. Is there any difference between the Xtar VC2, VC2 Plus and VC4 input power requirements while charging only one or two lithium batteries?
Power input ratings
VC2 — 5 volts @ 1 amp
VC2+ – 5 volts @ 2.1 amps
VC4 — 5 volts @ 2.1 amps
A 5 volts / 1 amp supply can be use with a VC2+ or VC4 when charging (only) one or two lithium batteries?
What occurs if the 5 volt current input falls under 1 or 2.1 amps? The charger lowers the charging amps and shuts down if it falls below a min. current setpoint?
All versions work exactly the same while trying to revive lithium batteries?
I have a Banyou BY002X ( li-0n USB powered ,2 slot)
With 2 batteries the power draw from usb is 5.26v, 1.8A ( battery from 3.3-3.5v )
Max power draw was 5.26v , 2.09A ( used Acer USB charger rated @5.35v , 2A .( Most powerful Usb charger / power supply I have !!!)
above 95-98% battery %, power draw was 5.26v, 0.12A or sometimes 0A !!!
I don’t know whether this is the max limit of power draw of the battery charger BY002X , or usb power supply max limit is reached.( The usb cables are rated @ 2A , I used the shortest cable )
What I mean to stress is Voltage draw is higher than than standard USB convection which is 5v +–0.5% ,
I wouldn’t be surprised if it draws 5.3-5.4v @2A !!!
U can go through HKJ review , I think he has explained ur doubt , by increasing the voltage to 5.2v+ and seen / shown reduction in battery charging time.