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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
1915mAh . This was the result of a 0.2A discharge . How long 1900mAh lasts (?) would depend on current draw .- old4570
- Post #59
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
? Eeeer ! I ran Pentax .... iSTD / K100 / K200 / Kx All of which used AA batteries .. I tried Alkaline / NIMH / and Alkaline Camera Batteries .. NIMH was the worst .. ( Shortest run time ) , then came stock Alkaline and the best were the Camera Alkaline . I still have 2x Pentax iSTD cameras...- old4570
- Post #55
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
Digital Cameras ! Thats where these batteries might work really well ! Back in the day , early days of digital cameras . They were powered by AA . And one of the big issues at the time was Voltage levels .. NIMH simply could not maintain the needed voltage levels . So the cameras always...- old4570
- Post #53
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
I discharged the AA Xtar @ 0.2A till termination ( protection circuit cut in ) and got 1915mAh .- old4570
- Post #52
- Forum: Flashlight Electronics - Batteries Included
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Xtar BC8 Review ( AA/AAA NIMH - Li-ion Charger )
For review I have the Xtar BC8 AA / AAA NIMH & for their proprietary AA / AAA Li-ion battery technology . ( Sent to me by Xtar ) This charger is not a Li-ion charger and you should not attempt to use it as such ! It is designed to recharge NIMH batteries and Xtars own Li-ion AA batteries . If...- old4570
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- Forum: Flashlight Electronics - Batteries Included
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Xtar BC8 AA / AAA ( Li-ion charger )
BC8 Charger charging a AA Li-ion from Xtar .. Charger starts at 4.2v 0.5A on the depleted battery .. And then the voltage climbs to 4.8 volts and then the current begins to drop and the voltage peaks at some 5 volts .- old4570
- Post #8
- Forum: Flashlight Electronics - Batteries Included
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Xtar BC8 AA / AAA ( Li-ion charger )
A) This charger is NOT suitable for recharging li-ion Let me explain .. The charge current for the li-ion AA from Xtar starts @ 4.2v 0.5A and the voltage slowly climbs higher .. This would make it unsuitable for charging Li-ion or Lipo batteries . Oh , and I discharged that AA li-ion @...- old4570
- Post #7
- Forum: Flashlight Electronics - Batteries Included
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Xtar BC8 AA / AAA ( Li-ion charger )
I was just moments ago trying to work out how to monitor the AA Li-ion charge .. And I have an idea that will work , I hope .. I just hope that any extra resistance wont stop the charge cycle ...- old4570
- Post #6
- Forum: Flashlight Electronics - Batteries Included
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Xtar BC8 AA / AAA ( Li-ion charger )
Where are we ... Had some really warm weather .. So just waiting for cooler days . ( Summer ) The charger works well with AA and AAA batteries ( NIMH ) , I have had no issues with the termination voltage and the always good part is that the NIMH are not being cooked by the charger ( getting...- old4570
- Post #5
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
Ok , had a bit of warm weather ! Things are cooler but silly humid ! First AA was discharged at 0.1A for just over 10 hours on my hobby charger . Voltage varied from around 1.43v to as low as 1.22 volts during the 10+ hour discharge .. 2nd battery just hit the discharge cycle : Will be...- old4570
- Post #50
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
Assume nothing ! My charger was calibrated quite a few years ago . What we can assume is that there is VOLTAGE sag under load . How that voltage sag affects performance ? Chargers usually stop discharging @ 0.8v for NIMH , butt .............. These Li-ion are different .. So when I...- old4570
- Post #47
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
It's what's claimed on the Label .. I have discharged both batteries ( I got 2 ) and will be recharging them when some NIMH I am putting through the BC8 charger are done . I plan to discharge in two different chargers over next few days to get some numbers . Doing paper math is well and good ....- old4570
- Post #46
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
NIMH battery @ 1A discharge ... Starting Voltage or resting Voltage was 1.37 volts 100mAh discharge = 1.27 volts 200mAh discharge = 1.17 volts 500mAh discharge = 0.99 volts 1 Amp discharge = 0.76 volts What I tested the Xtar @ 100mAh Discharge ... Initial voltage sag was around 1.25v but...- old4570
- Post #43
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
Not my math .... This is the math I shared : How much is mWh in mAh? Most people are used to seeing mAh ratings , they see the "2800" and go "wow, look at the capacity". The way they get the mWh rating is by multiplying the 3.7V nominal lithium cell voltage by it's actual mAh rating. So if we...- old4570
- Post #42
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
fivemega say's ......... In fact, you suppose to get 1.5V out so: 3300/1.5=2200 mAh or 2.2Ah If you test it with 1A discharge, you should get: 2.2/1=2.2 hours 2.2x60=132 minutes- old4570
- Post #40
- Forum: Flashlight Electronics - Batteries Included
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Xtar BC8 AA / AAA ( Li-ion charger )
Ok .......... But that's a variable . To many factors ... But for the Li-ion battery that's inside .. Also , a 1A discharge , oh the voltage sag = Not a true result for capacity . I did a discharge test : To test voltage sag under load . I tried to video the entire experiment ...- old4570
- Post #4
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
Ok , built a AA battery carrier ... So I can discharge with my hobby charger .. Re soldered wires to lower resistance as much as possible . 100mAh Discharge ... Initial voltage sag was around 1.25v but slowly increased to 1.38 volts ... 200mAh Discharge ... Initial voltage sag was around...- old4570
- Post #38
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
If's N Butt's .............. = Testing / and more testing ... Certainly in low current situations I can see where Li-ion would be very useful . In high current applications ? I have seen poor 18650 fail to maintain much over 1.5A so how these go ? Certainly I can see a current...- old4570
- Post #37
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
https://www.candlepowerforums.com/threads/your-usages-of-rechargeable-1-2v-ni-mh-or-1-5v-li-ion-aa-aaa-batteries.478408/page-2 So yeah , 4.2v stepped down .. Advantage = Constant 1.5v voltage .. Apparently the battery / circuit tries to maintain a constant voltage during the discharge . Whilst...- old4570
- Post #35
- Forum: Flashlight Electronics - Batteries Included
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Your usages of rechargeable 1.2V Ni-MH or 1.5V Li-ion AA/AAA batteries?
I will have to research AA / AAA li-ion ... If it really is 4.2v stepped down ? .............................................- old4570
- Post #34
- Forum: Flashlight Electronics - Batteries Included
