overcharged battery

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nocturn4l3030

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thanks everyone

batteries are one thing i havent studied much of..and if i understand correctly, these are unprotected but have safe chemistry?

so in general were not supposed to overcharge these....what are the dangers if i do? like left them in there over night or something? it just wouldnt fire my.mod and thats it?

and if i had a multimeter..and i checked the volts ...what would i even be looking at exactly?
 

Mudflap

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thanks everyone

batteries are one thing i havent studied much of..and if i understand correctly, these are unprotected but have safe chemistry?

Correct.

so in general were not supposed to overcharge these....what are the dangers if i do? like left them in there over night or something? it just wouldnt fire my.mod and thats it?

Overcharging above 4.25V may shorten life/cycles. Above 4.50V may even pop them or making them leak.

and if i had a multimeter..and i checked the volts ...what would i even be looking at exactly?

My AW IMR 14500's are usually around 4.15 to 4.19 volts coming off my Pila charger. I've actually discharged them below 3.5 volts a few times (not on purpose), so I might have damaged their optimum capacity.

You're using the WF-139, right?
 

mlinky

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thanks everyone

batteries are one thing i havent studied much of..and if i understand correctly, these are unprotected but have safe chemistry?

so in general were not supposed to overcharge these....what are the dangers if i do? like left them in there over night or something? it just wouldnt fire my.mod and thats it?

and if i had a multimeter..and i checked the volts ...what would i even be looking at exactly?

Read this thread (and re-read it) http://www.e-cigarette-forum.com/forum/ecf-library/129569-rechargeable-batteries.html Every bit of info contained in it is useful :)
 

Bobsyouruncle

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Probably left it on the charger after the light turned green. It's fine dude. In fact, you may enjoy a few hits at 4.22 - then you'll want a Grand with 5v batts :p
Doesnt that mean its done charging?
I dont get this...how do you over charge the battery when the charger shuts off when its reached full charge?
 

ancient puffer

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.....what would i even be looking at exactly?
When you take it out of the charger, set your MM to 20v (DC) and touch the RED lead to the positive (nipple :)) and the BLACK to the bottom (smooth). Normally, you'll get btw 4.14-4.19 volts. What you're looking for is an "overcharge" condition (never had one so no idea how high that would read). And overcharge, as I understand it, can result in a runaway discharge when you fire up the battery under load. Just as an added safety precaution, I always "test fire" the PV away from my face on it's first use with a fresh battery.

Once you get a MM, you can also check the charge after a few hours of use. I swap out the batteries when they drop below 3.9v. If you continue to use it, *eventually* it will drop so low it won't fire the atty, but the vapor drops off way before that. Staying at or above 3.9 gives you consistent monster clouds of vapor and flavor.

You can also use the Ω setting to test your attys on arrival to eliminate shorted ones (0 Ω) for their DOA warranty. If one starts to "drop off" in performance, sometimes you'll get wild readings like 40Ω, but mine usually clog up rather than going south like that. I got one once that read 8Ω. I tried it and it was awful. Sent it back, they replaced it no questions asked.

MM's are cheap and easy to find, Harbor Freight has one for around $5 here.

P.S. When testing resistance (Ω), first touch the leads together to get the resistance of the leads themselves. If it's not 0 (probably won't be), you need to subtract that reading from whatever you're testing to get an accurate reading. For example, if the leads show .4Ω and your atty shows 2.2Ω, you have a 1.8Ω atty. If your leads show .4Ω and your atty shows .4Ω, it has a dead short in it and will fry your PV. Throw it away or return it under warranty. Atty's are cheap, PV's aren't.

P.P.S. Now that I've discussed nipples and smooth bottoms, I have to go take a cold shower :)

ETA: Oops! Harbor Freight has them on sale for $3 atm. You can also find them at Home Depot, Lowe's, Radio Shack, maybe even Walmart and Target.
 

dopeh

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Doesnt that mean its done charging?
I dont get this...how do you over charge the battery when the charger shuts off when its reached full charge?

Understandably, but the OP said he over charged by 2 hours. How would one know if he over charged if no volt meter was on hand?
Once the light turns green on most chargers, there is still a trickle charge being applied.
 

mwa102464

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Actually you should give your Batts a rest when you take them out before charging them right away, couple hours would be good, then after you charge them you should do the same and give them some time before just slamming them right into your Mod. This is good care and your batts will last longer. You should have more than one or two batts and more like 6-8 if your using 14500 Cells and in the Reo Mini, same goes for the Grand and 18650's you should have at least 4 in rotation so you can do this. taking your batts right out of your Mods slamming them in the chargers and then right back into your Mods is not the best life and longevity for your rechargeable Batteries, make sure you have enough and secondly run quality Batts you and your Mods deserve this at a minimum.!
 
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