Can you tell me about how long it takes to charge 4 AA 2000 NMH batts at 2 amp in,1 amp ? It says 800mah in so shouldn't matter-right ? You say 2 amp in wall - panel better. Trying to deiced on best panel to get. Thanks. The Platt
1092318
4 AA 2500mAh batteries in 5 hours so 4 x2000 in 4 hours or 500 ma per hour. Won't make any difference what your charging source is, it only draws 500 ma
576782
In general, you can get an approximate time for charging anything from zero by dividing the mAh rating by 1000 and then dividing that by the amp rating of the charger. So in this case, you get 50,000/1000 = 50, which you then divide by the recommended 2A charger, and you get 25 hours. I'd add about 10% to cover efficiency losses, too. (This also means that using a 1A charger would require over two days to complete a charge.)Those who claim it can be charged in two hours are wrong. You'd need a 25A charger to do that, which don't exist for USB. You'd destroy the batteries anyway. In general, you can get an approximate time for charging anything from zero by dividing the mAh rating by 1000 and then dividing that by the amp rating of the charger. So in this case, you get 50,000/1000 = 50, which you then divide by the recommended 2A charger, and you get 25 hours. I'd add about 10% to cover efficiency losses, too. (This also means that using a 1A charger would require over two days to complete a charge.)Those who claim it can be charged in two hours are wrong. You'd need a 25A charger to do that, which don't exist for USB. You'd destroy the batteries anyway.
1275536
Remember that you are pushing amps back into the battery, and with normal losses this 5.3A panel and charger will likely give you 4.5 amps per hour at the battery in good to excellent lighting conditions (that's what I'm getting here in central Indiana). In a day, consider that you'll have 6 hours of bright sunlight, and another 4-6 of indirect sunlight. Conservatively that's about 8 hours of (8 hours x 5 amps) or 36 to 40 Amp-hours restored. That's enough to restore your 85 Ah battery each day if you take it down to 60%. This system should be fine for your battery--and others might point out I'm being very conservative. Even in late afternoon in indirect light I'm getting 4+ amps. You may find a fully-recharged battery each day by mid-afternoon.
837959
The panel does not output 5W like the specs and other reviewers suggest. The integrated *battery pack* outputs 5W, but the panel itself seems to only output in the range of 1W to 1.5W. From the specs directly from the manufacturer, the battery is 2200mah, and it takes the panel 10 hours to charge it. If you work the math out, that means it charges 220mah per hour, which would be 220ma of current @ around 5V (maybe slightly higher?), 5v * .22a = 1.1W Just because the unit has the capability to output at 5W, doesn't mean it can collect power from the sun comparable to a 5W panel.
2040804
Get an externle battry from EasyACC male sure its tells you it is for your device the battery in your device is a little to big for the smaller 3v off the panels its what I had to do brighT side is now I have a back up win the power is down for a while I hope this helps
206590
Depends what you're charging from and what kind of power output it has. Remember this is 13000mAh. It's a large battery. If you're charging from the wall try a different wall connector. If you're charging USB you have to consider the amp output of that port. And if you're using solar power you gotta consider output of that as well.
778250
This is a rough guess but, 6x35ah is 210 total Ah, and if you have 100w panel/ 12v it's about ~8 amp max. But I find mine realistically charges about 5 amp hrs per hr. So 210ah/5amp is 42hrs of charge time. so you prob have 7-9 hrs in day of good charge, so 42/~8 is at minimal 4 panels... I live in midwest and have less sunlight per day. But I think 4 is about minimal. I work more with electrical consumption than I do with battery charging so someone else might have better charging math, but I am familiar with electrical systems. Hope this helps and sorry for all the math, just wanted to back my answer. Good luck.
579317
I only use this as a backup or on the road. I'm not happy that you can't charge any in between mah.... ex.. 3300mah has to be charged at 3000mah. As for 8000mah, it only goes up too 5000mah. Hope this helps.
464999
The wall wart is the size you described. No its not a smart charger. This is not a LiOn battery. This is a run of the mill sealed lead acid battery. It puts out 400ma on a 7ah battery and takes days to fully charge. I wouldn't be to concerned with overcharging. I would be more concerned with to much of a drain for the charger or the 5 watt solar panel that is intended for this unit. With no solar or charging, the battery will last about 30 days transmitting a few dozen pictures a day with little downloading. And yes, the wall wart is 115ac with no adapter. If its different, this is literally a $2 charger. The wall wart is the size you described. No its not a smart charger. This is not a LiOn battery. This is a run of the mill sealed lead acid battery. It puts out 400ma on a 7ah battery and takes days to fully charge. I wouldn't be to concerned with overcharging. I would be more concerned with to much of a drain for the charger or the 5 watt solar panel that is intended for this unit. With no solar or charging, the battery will last about 30 days transmitting a few dozen pictures a day with little downloading. And yes, the wall wart is 115ac with no adapter. If its different, this is... » Read More The wall wart is the size you described. No its not a smart charger. This is not a LiOn battery. This is a run of the mill sealed lead acid battery. It puts out 400ma on a 7ah battery and takes days to fully charge. I wouldn't be to concerned with overcharging. I would be more concerned with to much of a drain for the charger or the 5 watt solar panel that is intended for this unit. With no solar or charging, the battery will last about 30 days transmitting a few dozen pictures a day with little downloading. And yes, the wall wart is 115ac with no adapter. If its different, this is literally a $2 charger. « Show Less
1373233
If you started with a fully charged battery and ran on hi setting how soon, if ever, would the power degrade to the point where brightness was affected? I have never tried it so I don't know for certain. The spec sheet says it will put out 5000 lumens (brightest setting) for one hour 15 minutes.The charger output is 2 A.The battery rated output is 5200 mAH.The charging time Is about four hours. So you could calculate but. if it didn't work you could use back up battery pack(s). You have me curious now about what kind of an application would allow you to have it plugged in to AC four hours.
1069840
There are numerous manual settings. In auto mode, it charges my 6400 mah battery at about 4 amps and takes 90 minutes. 5 amps is the max manual setting and should charge a 5000 mah battery in 1 hour. You should not charge these batteries at higher than 1C (ex. 4000 mah battery, 4.0 amps max).
1091350
Hello. From my understanding and current tests. The higher capacity device will pull 2A. And the lower end device will pull 1A. I have ordered a USB Meter to see if either USB port is designated solely for 2A. So far. The panels put out great power and I am satisfied. I haw changed an iPhone4, iPad mini no retina, lg android, 12000 Mah newtrent power extreme battery bank, 5200 Mah brightech battery bank, and eneloop rechargeable batteries with the eneloop USB charge adapter. All devices function and chare fine. The phones and tablets will read an error of power soure of the panels are not in direct sunlight. It's an easy fix. Just position the panels on the sun again. I highly recommend a external battery bank. This way you store the unused power. No sense in wasting free juice. Hope this helps.
744036
I know what you want to know, but your question has a slight error. You want to know how many mA (milli-Amps) this device puts out- not how many mAh (milli-Amp-hours). From the product description: Dual USB Charging Ports: Provides 1.0 amp of current when charging one device, and 0.5 amps of current to each port when charging two devices from AC or DC power. For AA or 9V charging, single port charging is supported. DC 5V +/- 5% 1000mA MAX So if your device is capable of absorbing 1000 mA (1 A), and you leave it connected for 1 hour, you would deliver 1000 mAh. Two hours, 2000 mAh, three hours, 3000 mAh, and so on. It's perhaps a fine distinction but it is important. HOWEVER- I think you may be disappointed if you try to use this as your primary charger for a device that requires 2100 mA of charging current (note I did not include the 'h'). It will only deliver 1A maximum, so if your Galaxy Tab will even charge from this device, it will take approximately twice as long as it would to charge from the Galaxy Tab's original AC adapter. HTH
1049747
Hey Randy,Battery charging time depends on a variety of factors (temperature, battery condition, state of charge, etc), but will take a good amount of time. When I was using it, my batts were never more than 25% discharged, the outside temp was 90 degrees, and charging took 2-3 hours. The charger is putting out more than 1000w, so it's not a lightweight.As far as the plug, it depends on what your car has. The connector is an SB50, which looks like two blades next to each other, enclosed in a flat plastic housing. About 1.25" wide, 1.5" long and 3/8" tall. You can swap the plugs, if the SB50 is not on your cart. I used this for a 1970s Taylor Dunn, so I had to custom-wire a cable for charging. Hey Randy,Battery charging time depends on a variety of factors (temperature, battery condition, state of charge, etc), but will take a good amount of time. When I was using it, my batts were never more than 25% discharged, the outside temp was 90 degrees, and charging took 2-3 hours. The charger is putting out more than 1000w, so it's not a lightweight.As far as the plug, it depends on what your car has. The connector is an SB50, which looks like two blades next to each other, enclosed in a flat plastic housing. About 1.25" wide, 1.5" long and 3/8"... » Read More Hey Randy,Battery charging time depends on a variety of factors (temperature, battery condition, state of charge, etc), but will take a good amount of time. When I was using it, my batts were never more than 25% discharged, the outside temp was 90 degrees, and charging took 2-3 hours. The charger is putting out more than 1000w, so it's not a lightweight.As far as the plug, it depends on what your car has. The connector is an SB50, which looks like two blades next to each other, enclosed in a flat plastic housing. About 1.25" wide, 1.5" long and 3/8" tall. You can swap the plugs, if the SB50 is not on your cart. I used this for a 1970s Taylor Dunn, so I had to custom-wire a cable for charging. « Show Less
706299
The wall wart is the size you described. No its not a smart charger. This is not a LiOn battery. This is a run of the mill sealed lead acid battery. It puts out 400ma on a 7ah battery and takes days to fully charge. I wouldn't be to concerned with overcharging. I would be more concerned with to much of a drain for the charger or the 5 watt solar panel that is intended for this unit. With no solar or charging, the battery will last about 30 days transmitting a few dozen pictures a day with little downloading. And yes, the wall wart is 115ac with no adapter. If its different, this is literally a $2 charger.
471123
I have different usb wall chargers, and the batteries charged ok with all of them. They also charge when connected to the pc's usb. Pay attention to the current the charger may provide (notice the mA or A value on the charger. If it's too high, the battery may charge faster, but you risk to damage it.)
1173233
Eileen, Thank you for your purchasing.The situation is normal in most of cases.The 5w kit can charge 1-2AH/day to a 12v battery in good sunshine. So if the battery is larger than 12v 10ah, it take more time to full charge the battery.You can use a multi meter to test the current to the battery to confirm that the panel is still charging the battery.