I have an RC Quadcopter with a 7.4v 650mAh 14500 Li-ion battery, I want to replace the batteries with higher capacity ones.
I found these, they're identical in all the details except with a higher mAh.
My question now is, would the old charger work with these? The charger's output is 7.4v 800mA.
Any help would be appreciated, thanks!
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I'm interested in buying an external battery charger, or a cradle charger, so I can have two batteries going—one always charging outside of the phone—and thus never having to plug my phone in to charge. After a brief eBay search, all of the cheapest ones appear to be the same: you can find the model I'm referring to here.
My concern, however, is with the specifications listed, which read:
Input: AC 100-240V~50/60Hz 0.15A
Output: DC 4.2V~350mA~±50mA
USB: 5.2Vd.c.800mA
The output appears to be 300-400mA, which is slightly lower than a stock charger. As far as I know, this tells me how fast it will charge the battery. Since it will be plugged into the battery charger when I swap batteries (for the full discharge of the other battery), I don't care if it charges slower. However, the voltage appears to be quite low at 4.2V—and I'm entirely unsure how this will affect things. Will it still charge? Can it do damage to the battery? Should I not purchase this unit? What exactly does a lower/higher voltage mean?
Anyone?
Does it work? Is it safe? Does the lower voltage matter?
I've been using this same battery charger for over a year now. It charges my stock and extended battery (3500mAh) without any problem. Yes it does take longer compared to the normal charger to charge your battery because of the low mA but I don't think it has had any affect on my batteries. So the only downside is it takes comparatively longer to charge.
mo_danish said:
I've been using this same battery charger for over a year now. It charges my stock and extended battery (3500mAh) without any problem. Yes it does take longer compared to the normal charger to charge your battery because of the low mA but I don't think it has had any affect on my batteries. So the only downside is it takes comparatively longer to charge.
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Great! That's what I wanted to know. Thanks!
I have this charger as well. I can confirm that I have have not had any problems with the charger sense I got it. I ordered mine from Amazon here:
http://www.amazon.com/2600mAh-Batte...3352199&sr=8-4&keywords=Galaxy+note+batteries
Please help! I am trying to figure out which of these portable batteries is going to be stronger.. one that outputs 5W or 5V? I tried to google an answer and conversion but they need a variable of how many amps to convert which I have no idea...
I just ordered a portable battery from ebay, (http://www.ebay.com/itm/2600mAh-Uni...891701?pt=PDA_Accessories&hash=item2c67137df5) one of these kinds that have an output of 5V. This little cheapo is not putting out nearly enough power to charge my android so I was thinking to get one my friend has its called an Igo battery http://www.igo.com/invt/ps002730001 that has a output of 5W
blindskater39 said:
Please help! I am trying to figure out which of these portable batteries is going to be stronger.. one that outputs 5W or 5V? I tried to google an answer and conversion but they need a variable of how many amps to convert which I have no idea...
I just ordered a portable battery from ebay, (http://www.ebay.com/itm/2600mAh-Uni...891701?pt=PDA_Accessories&hash=item2c67137df5) one of these kinds that have an output of 5V. This little cheapo is not putting out nearly enough power to charge my android so I was thinking to get one my friend has its called an Igo battery http://www.igo.com/invt/ps002730001 that has a output of 5W
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According to the info from the two product pages, they have exactly the same wattage and voltage. However, the eBay item has a higher mAh (2600mAh vs 1800mAh), which is a measure of how much power it can deliver in total.
The math I used is that standard USB power is 5V, so both battery packs would output 5V. The math for calculating Watts is simply: Amps x Voltage = Watts.
Ebay Battery
Rated at 1000mA. So 1A x 5V = 5W
iGo Battery
Rated at 5W. So 5W / 5V = 1A
mA = milliAmps or how much pwer it delivers.
A = 1000 milliAmps
mAh = milliAmphours or how long it can deliver power
Watt = a standard unit which relates the rate of energy transfer
hello.
is it correct that the anker extended battery for the s4, should be showing a capcity of 2600mah in battery monitor pro?
is it because it is 2 x 2600 batteries joined together?
bit confused.
To my knowledge battery Mon pro won't be able to automatically determine accurate capacity of the battery when you just plug it in. It has to calculate it through extended use by monitoring discharge rate, and even that is not accurate.
anker 5200
same as me,
i try using battery doctor or du battry saver but it's only show 2600 mah in system.
i wonder how to make it show 5200mah
just watch the voltage. You will know what it's got left by watching the voltage drop after a few days. The cheap apps are telling you 2600 because that's what the phone comes with. It's written in
Use Android Tuner or battery calibration on appstore, they give actual voltage
Any Doubble Power Battery ???
Six hours continuous use
Confirming my Anker 5200mAh Extended Battery provides six hours continuous use with my Galaxy S4.
Very happy with my purchase, and recommend the Hyperion HoneyComb TPU Extended Battery case for use with this extended battery.
how much do you know about external chargers
samuelson said:
hello.
is it correct that the anker extended battery for the s4, should be showing a capcity of 2600mah in battery monitor pro?
is it because it is 2 x 2600 batteries joined together?
bit confused.
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Click to collapse
many external chargers especially ordinary chargers are oversized in capacity. though they may be very cheaper, they are usually shoddy and deceptive. i recommend you to read this article.
Don’t buy external battery before you read this!
As we have more and more gadgets, we are expecting our gadgets can always work when we need them. Our gadgets can do almost everything — until they run out of fuel. Times when you need to make that important call, send out an urgent e-mail, or need to use the apps on your device – but alas there is no battery…we’ve all been there and know first-hand the stress of being offline when you need to get things done!
External battery is indispensable for our smart life, but how much do you know about the external battery? Does your external battery really charge your gadget or make the damages to your battery of gadgets?
1) What’s external battery?
External battery serves as an ‘extra battery’ or external charger for your phone or other electronic devices.
2) Where is external battery made from?
Majority of the external batteries in the market are actually made in China. And the battery cells or PCB modules are from different countries.
3) How do I charge the external battery?
You can charge your external battery via the charger that came with your phone, computer usb port or using other external battery
4) How long do I need to charge the external battery?
It depends on the REAL CAPACITY of the external battery. The larger REAL CAPACITY, the longer charging time may required. Different charging methods may result in different charging time as well. Charging with the original charger will be faster than charging with computer usb port.
5) Why sometime I need longer time to charge the same external battery?
Even though using the same charging method, the charging time may be differ due to environment, temperature, power flow and etc.
6) What is mAh?
mAh mean milli Ampere Hour, the capacity of the external battery is measured with mAh
7) Is a 12000mAh REAL CAPACITY external battery, able to charge a 1500mAh capacity phone for 8 times full?
This is a common mistake made by most of people. For rough calculation of the total charge time, kindly use this formula
REAL CAPACITY * conversion rate * phone battery health / phone capacity = total charge times
EXAMPLE: 12000 x 0.8 x 0.8 / 1500 = 5.12 charge times (0.5-1 times plus minus)
8) What’s conversion rate?
Conversation rate is the remaining percentage of the battery after the battery loses in heat or PCB operation.
9) What’s phone battery health?
In simple, it means how ‘healthy’ your phone battery is. Phone battery storage capacity will be lower and lower. That’s also the reason why our phone can last longer when it’s newly bought than after 3-6 months of use. Different mobile phone models also will affect the calculation as some phones drain battery faster than others.
10) What’s PCB?
PCB means Printed Circuit Board, which controls all the operation flow inside the external battery. A good quality PCB will allow the external battery to charge more and have better durability
11) What’s the difference between 18650 and Li-Polymer in the external battery?
- 18650 size and dimension are fixed. Li-Polymer size and dimension are flexible.
- 18650 produces more heat. Li-Polymer is much safer
- 18650 is cheaper. Li-Polymer is more expensive
- 18650 has a higher self discharge rate. Li-Polymer has a very low self discharge rate
- 18650 battery capacity drops faster. Li-Polymer battery capacity is more durable
12) What’s the common REAL CAPACITY in 18650 external battery in the market?
- External battery using 1pcs 18650 is 1200mAh – 2600mAh
- External battery using 2pcs 18650 is 2500mAh – 4400mAh
- External battery using 3pcs 18650 is 3750mAh – 6600mAh
- External battery using 4pcs 18650 is 5200mAh – 8800mAh
- External battery using 5pcs 18650 is 6500mAh –11000mAh
- External battery using 6pcs 18650 is 7800mAh –13200mAh
- External battery using 7pcs 18650 (no info)
- External battery using 8pcs 18650 is 10400mAh –14400mAh
1 3) Is there any external battery with a capacity higher than 2200mAh per 18650?
Yes. There are, but it’s not common due to the expensive pricing.
14) What’s the difference between branded external battery and generic external battery?
Branded external battery is mostly sold in REAL CAPACITY. Generic external battery is mostly sold in MARKING CAPACITY. That’s the reason why you will never see any branded external battery (standard size) with a capacity as high as 30000mAh – 50000mAh. That’s also the reason why a good 12000-13000mAh external battery is able to charge more or almost the same as the market level of 30000-50000mAh. Most of the external batteries sold on amazon.com with low price are MARKING CAPACITY but not REAL CAPACITY. Those with higher price and long warranty(more than one year, some brands offer 18 months of warranty, like Sony, KINKOO, Xstorm) are REAL CAPACITY and reliable.
15) Is it true branded external battery won’t explode and generic external battery will explode?
Anything to do with battery will have a chance to explode. No matter it’s branded external battery or generic external battery. But chances for both branded and generic external battery to explode are very low, except for those cheap and poor-quality 18650 batteries. And the Li-Polymer is safer than 18650 battery, it’s easy to fit the high-temperature environment.
,
with the included Moto G USB cable to charge the phone? Obviously, the G doesn't come with a wall adapter so I was wondering if this will be OK - i.e. same voltage, etc. - and not fry the battery.
Thanks
terrapin69 said:
with the included Moto G USB cable to charge the phone? Obviously, the G doesn't come with a wall adapter so I was wondering if this will be OK - i.e. same voltage, etc. - and not fry the battery.
Thanks
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Once i read that most new batteries (since 4 year ago to now) can use different chargers with higher amperage without being damaged, o i think you can. i think thats why they don't include charger, because most people already have one at home.
Fast charging causes reduction of long-term battery capacity
elestudiante said:
Once i read that most new batteries (since 4 years ago to now) can use different chargers with higher amperage without being damaged, so i think you can. i think thats why they don't include charger, because most people already have one at home.
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My response here to the above answer is what I understand as a layperson who has recently done internet research into this issue of which power adapters would be ok to use with the Moto G. I will be happy to stand corrected by anyone who has contradictory authoritative information.
My understanding is based on the Battery University website entries on lithium ion batteries:
batteryuniversity.com/learn/article/charging_lithium_ion_batteries
batteryuniversity.com/learn/article/ultra_fast_chargers
Although the above quoted answer on using the Galaxy S4 charger with the Moto G is mainly correct (in that no direct damage to the phone circuitry or immediate damage to the battery will occur by using the higher amperage charger), there still will be a long-term negative affect on battery capacity by using a higher amperage charger.
I believe the S4 comes with a 2A charger. According to Motorola online support website
( motorola-global-portal.custhelp.com/app/answers/prod_answer_detail/a_id/97318/p/30,6720,9050/action/auth )
the Moto G will automatically restrict charging above 1500mA. So that would mean that a 2A charger would cause the Moto G to charge at the 1500mA rate. No damage would be done to the phone circuitry charging at the allowable rate of 1500mA, but the question remains if there would be a long-term reduction of battery capacity by charging at 1500mA for a year or more. The official Motorola charger sold online is now 1200mA. So the comparison should be between charging at 1200mA versus 1500mA.
According to the Battery University website, the optimal range to charge lithium ion batteries is between .5C and .7C. Lower charging rates result in less reduction over time of battery capacity. The C-rate unit is used to measure charging and discharging rates. A value of 1C is equal to the rated amperage of the battery. So, for the Moto G, 1C is equal to 2070mA. Therefore, according to this recommendation, the optimal charging range for the Moto G would be between .5 x 2070 = 1035mA and .7 x 2070 = 1449mA. So, charging at the Moto G's maximum of 1500mA would be just barely outside the optimal range.
But extrapolation from Figure 1 in the Battery University 'Fast and Ultra-Fast Chargers' article indicates that there would be an additional 9% reduction of battery capacity by charging at a 300mA higher rate of 1500mA over the official charger rate of 1200mA. This additional reduction in capacity of 9% would be over 500 charging cycles, or about 1.5 years of average usage. The normal reduction in capacity just from aging over 500 cycles is already listed as 16%, so adding the 9% would bring it to a total of 25% loss of battery capacity after about 1.5 years.
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UPDATE and CORRECTION:
I have more authoritative information directly from Battery University that changes the conclusion I draw above based on my effort to extrapolate from the Battery University website article.
The extrapolation I did above was based on the additional loss of battery capacity cited when going from a 1C to 2C charging rate. But according to direct communication from Battery University, when charging at a rate below .7C there should be no measurable improvement to capacity by using slower charging rates. Charging above .7C would still be expected to add more stress to Lithium Ion Polymer batteries and likely add to long-term reduction of capacity.
So, what this means for the Moto G and Nexus 5 is that there should be no measurable difference between charging with 2A, 1.2A, 1A, or 850mA chargers as far as effect on long-term battery capacity goes. Both the Moto G and Nexus 5 are supposed to automatically restrict the charge rate at 1500mA even when using a faster charger, which is just at or below .7C for both phones. So, as long as the charger dependably keeps to 5V, a higher amperage 2A charger will be faster but pose no problem to long-term capacity.
I have "iball 7334i" andriod tablet it has 5v 1000mA charger and 3000mAh Lithium ion Battery and its get full charge in 3 hours.
I want to buy 5v 1500 mA charger so it get charged faster than before . I want know that 5v 1500 mA charger will affect my battery life or will it heat my tablet or will it is suitable for my tablet's battery.
Thanks