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 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... » Read More 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 « Show Less
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
2055884
The charging current is 400mA when charging 2 cells in series, 800mA when charging 4 cells. That means a pair of 2000mAh batteries will take ~5 hours to charge (2000mAh / 400mA = 5hr). It does not matter if the power source is rated 1A or 2A. You cannot charge any faster.
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.
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
693765
This battery is a bear. On a slow trickle it takes about a week with a 1.5amp battery tender. I think that any slow charging is good, but I would be hesitant to have solar be my primary source. I have toyed with the idea of getting a panel, but usually don't stay out long enough to justify it. These are great batteries though. I have two in parallel, and they go for days with about five years on them.
1056172
I went to ebay and bought a half dozen of the highest Mili amp hour (mha) batteries I could find (bought the GOLD ones cheap) and a couple of plug-in-the-wall chargers cheap. They work great and you don't have to keep your computer plugged in for four hours or more to charge the batteries. The plug-in-the-wall chargers have a light that glows magenta while charging and turns blue when done. I use the radio quite a bit and this works for me. I always have a few charged batteries. Recording time on the highest setting with fully charged batteries usually runs around 7-8 hours There was probably a fit issue for any kind of AC adapter circuit in the radio. I went to ebay and bought a half dozen of the highest Mili amp hour (mha) batteries I could find (bought the GOLD ones cheap) and a couple of plug-in-the-wall chargers cheap. They work great and you don't have to keep your computer plugged in for four hours or more to charge the batteries. The plug-in-the-wall chargers have a light that glows magenta while charging and turns blue when done. I use the radio quite a bit and this works for me. I always have a few charged batteries. Recording time on the highest setting with fully charged batteries usually runs around 7-8 hours There was... » Read More I went to ebay and bought a half dozen of the highest Mili amp hour (mha) batteries I could find (bought the GOLD ones cheap) and a couple of plug-in-the-wall chargers cheap. They work great and you don't have to keep your computer plugged in for four hours or more to charge the batteries. The plug-in-the-wall chargers have a light that glows magenta while charging and turns blue when done. I use the radio quite a bit and this works for me. I always have a few charged batteries. Recording time on the highest setting with fully charged batteries usually runs around 7-8 hours There was probably a fit issue for any kind of AC adapter circuit in the radio. « Show Less
1529917
Both the chargers are self regulating depending on the battery voltage so the 5amp charger will charge faster if the battery voltage is low. If you discharge the battery to a low level the 5amp charger is the best solution if you don't discharge the battery to a low voltage condition the two amp charger is fine. To cover all conditions the 5amp is best. Make sure your battery and connector are compatible. Hope this helps
1207496
if you use 2.4Ahr batts x 4 @ 1.2vdc each thats 4.8vdc 2.4Ahr.... (yes the charger actually uses 2.4vdc x 4.8Ahr) theres switching losses and controller losses in getting it up to 5vdc(20% ?) and your phones batt of 1.3Ahr also has losses in charging electronics(20% ?) as well as the battery losses itself(???)....... no one thought you could move and change power without loss.. did they? but still ~50% loss seems a little high... mabey it can charge it ~1.3 times? thats more like 20% loss on both devices as you might expect from cheap consumer goods
2216334
Since this is the OEM brand, it will take 6-8 hrs, that means the battery itself is most likely about 225mA at 7.4V giving you a 45min runtime. I figured this all out by taking the .2A that's on the charger, knowing how long my manual says the battery should last when running (45min). Divide 45 by .2mA and that gives you the battery capacity, and if you're clever enough, you realize that .2=5 (convert decimal into fraction, then inverse it) and 45 * 5 = 225. It's an approximation. Though it really helps when figuring this stuff out.
779402
I have 6 12 V 35AH batteries. I wish I had one more panel to charge in one 5 hr period. Here are my calculations. Assuming a 50% charge, each battery needs about 17 AH to recharge. 2 panels each put out about 8 amps. so 8 hrs X 16 amps is 128 AH. 128 / 17 is about 7. So my answer would be 7 35AH batteries.
352792
Throwing in my two cents. Get two for this. It'll work fine for awhile for you the way you want to do it, but ultimately, your battery is going to lose charge 'cause you will be running close to max on the panel all things considered unless you are in bright sunlight all the time. Plus, over time, your battery is not going to charge as efficiently. My 100W Grape tests at 5 amps in good sunlight. But then there's nighttime....:-) I run an off grid system, and am going to get a second panel just because of those cloudy days. An MPPT controller will help maximize your charging too. I haven't gotten one of those yet. Throwing in my two cents. Get two for this. It'll work fine for awhile for you the way you want to do it, but ultimately, your battery is going to lose charge 'cause you will be running close to max on the panel all things considered unless you are in bright sunlight all the time. Plus, over time, your battery is not going to charge as efficiently. My 100W Grape tests at 5 amps in good sunlight. But then there's nighttime....:-) I run an off grid system, and am going to get a second panel just because of those cloudy days. An MPPT controller will help maximize your charging too. I haven't... » Read More Throwing in my two cents. Get two for this. It'll work fine for awhile for you the way you want to do it, but ultimately, your battery is going to lose charge 'cause you will be running close to max on the panel all things considered unless you are in bright sunlight all the time. Plus, over time, your battery is not going to charge as efficiently. My 100W Grape tests at 5 amps in good sunlight. But then there's nighttime....:-) I run an off grid system, and am going to get a second panel just because of those cloudy days. An MPPT controller will help maximize your charging too. I haven't gotten one of those yet. « Show Less
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.
1703909
If you're asking how long it takes to charge this battery, approximately 6-8 hours if you use a 2.1 amp charger
1332085
Battery should be described as 2ah (amp hour) & 4 ah. The 4ah battery will last about twice as long between charges as the 2ah battery. Two 2ah batteries will allow you to keep working while recharging the other battery. However I have one 4ah battery for my pole saw that lasts as long as I do. There are other pages on Amazon that correctly describe the battery as 2ah or 4ah. You may want to order from a vendor that more accurately describes his product (I looked and didn't find a better description that was compatible with the same charger as the one you are considering). Also confirm that the battery that you order is compatible with the charger. I see that there is ample opportunity to get a mismatch.Good luck. See: http://www.amazon.com/Greenworks-29662-40V-Lithium-Ion-Battery/dp/B00KJ65W8K/ref=pd_sbs_lg_31?ie=UTF8&refRID=0QM0C77332G6JXX5PR6T
1120928
No where! The battery compartment of the unit is made for four AA cells only. Four AA cells connected in series, will give 1.5x4=6 Volts. Perhaps there is error in the sticker on the back side of ths gadget where it is written that the DC outlet should be connected to 200 mA 9 V (core negative) DC supply!! I have owned this dictionary for last 12 years and have gifted to many children and had not noticed this error. Thanks for pointing it out. BTW most of the DC supplies are core positive unlike the recommendation here, so if at all you wish to use a DC supply please buy the original unit manufactured / recommended by Language Master only to safeguard your dictionary. No where! The battery compartment of the unit is made for four AA cells only. Four AA cells connected in series, will give 1.5x4=6 Volts. Perhaps there is error in the sticker on the back side of ths gadget where it is written that the DC outlet should be connected to 200 mA 9 V (core negative) DC supply!! I have owned this dictionary for last 12 years and have gifted to many children and had not noticed this error. Thanks for pointing it out. BTW most of the DC supplies are core positive unlike the recommendation here, so if at all you wish to use a DC supply please buy the... » Read More No where! The battery compartment of the unit is made for four AA cells only. Four AA cells connected in series, will give 1.5x4=6 Volts. Perhaps there is error in the sticker on the back side of ths gadget where it is written that the DC outlet should be connected to 200 mA 9 V (core negative) DC supply!! I have owned this dictionary for last 12 years and have gifted to many children and had not noticed this error. Thanks for pointing it out. BTW most of the DC supplies are core positive unlike the recommendation here, so if at all you wish to use a DC supply please buy the original unit manufactured / recommended by Language Master only to safeguard your dictionary. « Show Less
1586756
This charger's max charge rate is listed at 5.0 A (5000mA). From here you just do the math... mAh = milliAmphours. If your battery is a 1600mAh capacity, that means you can run an electronic device drawing 1600mAh for 1 hour before your battery is exhausted. The same thing applies to charging. If you want to charge your 1600mAh battery at the 5000mA rate, it would be 1600/5000 = 0.32 * 60 minutes = 19.2 minutes total charging time.For your 3200mAh battery, it would be 38.4 minutes.Hope that helps!
1325076
Well if you want it to take an INSANELY long time, at about .... what's the spec for USB? 2.5 watts? yeah that would take way way way too long, probably 7 or more days, 24 hours plugged in. You can go get a 28 watt solar panel ( I learned very recently that if you multiply volts and amps, you get watts, so that's cool) I think this thing takes about 30 watts to charge at it's rated speed, so 2 or 3 watts below that won't hurt anything unless it's like a really critical situation and this is desperately needed to be charged in that situation, in which case it should have already been charged prior to this situation! Well if you want it to take an INSANELY long time, at about .... what's the spec for USB? 2.5 watts? yeah that would take way way way too long, probably 7 or more days, 24 hours plugged in. You can go get a 28 watt solar panel ( I learned very recently that if you multiply volts and amps, you get watts, so that's cool) I think this thing takes about 30 watts to charge at it's rated speed, so 2 or 3 watts below that won't hurt anything unless it's like a really critical situation and this is desperately needed to be charged in that situation, in which case it should have already been charged... » Read More Well if you want it to take an INSANELY long time, at about .... what's the spec for USB? 2.5 watts? yeah that would take way way way too long, probably 7 or more days, 24 hours plugged in. You can go get a 28 watt solar panel ( I learned very recently that if you multiply volts and amps, you get watts, so that's cool) I think this thing takes about 30 watts to charge at it's rated speed, so 2 or 3 watts below that won't hurt anything unless it's like a really critical situation and this is desperately needed to be charged in that situation, in which case it should have already been charged prior to this situation! « Show Less
1421452
It works fine for any size battery. A slower charge is better for the battery as it creates less heat. If you are not in a rush this will work fine. For your battery, it will take it from a state of charge of 50% t0 90% in under 5 hours and will have it topped off by 7 hours or so. I like this charger so well, I'm buying two more. One to put a winter maintenance charge on all my equipment batteries, and one as a permanent install on a car. I have the 10 Amp version which I'm also very pleased with. I use in to charge my boat battery which is a little small but I'll be swapping it out for two larger batteries. It works fine for any size battery. A slower charge is better for the battery as it creates less heat. If you are not in a rush this will work fine. For your battery, it will take it from a state of charge of 50% t0 90% in under 5 hours and will have it topped off by 7 hours or so. I like this charger so well, I'm buying two more. One to put a winter maintenance charge on all my equipment batteries, and one as a permanent install on a car. I have the 10 Amp version which I'm also very pleased with. I use in to charge my boat battery which is a little small but I'll be swapping it out for... » Read More It works fine for any size battery. A slower charge is better for the battery as it creates less heat. If you are not in a rush this will work fine. For your battery, it will take it from a state of charge of 50% t0 90% in under 5 hours and will have it topped off by 7 hours or so. I like this charger so well, I'm buying two more. One to put a winter maintenance charge on all my equipment batteries, and one as a permanent install on a car. I have the 10 Amp version which I'm also very pleased with. I use in to charge my boat battery which is a little small but I'll be swapping it out for two larger batteries. « Show Less