how long would it take to charge fully by sunlight if totally drained?
1547664
Well mine took 2 days but really about 1 day if left in the sun all day long where as mine was not so took 2 days
334170
You are right it drains more then charges, that's why I wouldn't buy one. When the sun is shining bright it charges but when the sun changes angles and the light is less it discharges so if you do not disconnect it approaching evening it will discharge and in the morning it will be low or dead.
912403
charge it as many times as you want by the sun depends on how much sun you get it takes about 3 days for 100 percent. to help get to 100 % you can charge it by a lamp or any light.
2262377
So far I have only charged off a USB port, works fine, in 8-12 hours. The claim is that the solar cells will charge in about 4 hours, but have not yet had occasion to try it out, the savings of electricity in the city probably not worth the wear and tear, e.g. peeling off the plastic!
612561
The seller lists the optimal power outputs at "5W puts out ~1A the 7W ~1.4A and the 10W ~2A" So that should mean that a 10,000 mAh (10 amp) battery should charge in ABOUT 7.14 hours (7h 8m) in full sunlight using the 7W version.
1614671
It will take several days if they are severely drained. Only because they are designed to charge slowly for a deep charge. My trailer batteries are 6 volt deep cycle and take several days to charge.
75876
A fully depleted battery should be fully charged in about 3 hours. Thank you
436194
When the solar battery is fully charged it last all night long. It will go from approx. 6PM to 7AM in the morning when fully charged.
2087638
This power pack stores about 23 amps. The pack contains a power cord to charge the unit. It takes about 3 hours to fully charge from a depleted state. The solar function is only a trickle charger. However, Do Not Leave It in direct sunlight. In summary, a good, universal power pack.
643248
A good 100 watt solar panel properly aligned to the sun in very bright sunshine will provide about 5 to 6 amps of charge into a 12 volt battery. A commonly used solar storage battery has a capacity of approximately 100 ampere hours (about the capacity of a fairly large "marine" style battery). This battery would require about 12-15 hours of GOOD sunshine to recover from being HALF discharged. This truth is almost always what's left out of the sales pitches for these "plug and play" solar generator systems. Yes, they may have an output of 1000 watts "continuous power"...but the reality is that the storage battery providing that 1000 watts will only last an hour or so. The math is simple. Don't be fooled by vague specifications. ASK QUESTIONS OF THESE SELLERS!!!
463218
I'm not sure, I've never had to recharge from 0%, but it usually takes about 90 minutes to recharge from under 50%
1127723
How long did it take you to charge this up to full capacity upon receiving?
2172492
yes if you let it fully charge it will go longer. i think it takes about an hour for it to be completely charged, once the light stops blinking its ready to go.
1623722
never timed it, but usually i charge at about 50-25% available power and seems like it takes several hours--It just leave it in charger in the AM and remove later in afternoon..Sorry not exact..
946166
With good sun about 8 hrs for a full charge. I pre-charge mine w/my phone charger before I head out though.
321574
I'm not quite sue--I've never used it long enough to drain a charge. My guess would be several hours. Sorry I can't be more helpful.
2098385
Not certain. When running low I plug in for 4 hours and I seem to get a full charge.