Durable Laptop Batteries
High power 18650 Lithium Battery for your flashlight
A short demo showing how get good quality 18650 cells to power your ultrafire high powered LED torches
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Chinese? 4 year olds can do this blind folded in under a minute
IME they are mostly glued and not designed to open. If you are very careful you may be able to do this, but things like the thermisters are almost impossible? to remove without damage, which will cause a charge fault on the laptop. When I first started this, I was trying to keep the charging circuits too (to may 8 way chargers). Its very hard.
Very helpful. Thank you. Too bad you have to distroy the cell sheeving for your labtop battery. I was actually hoping to fix mom’s labtop battery. I have extra? protect AW 18650 battery unused and wanted to stick it in. Now’s it’s back to the drawing board.
my pleasure
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good video thanks for? idea
There are very few cells on the market that are 3Ah at high amp load. Most of the 3Ah cells are rated 3Ah at something like 300mA. When you run them in XM-L flash light running at say 1-2.5A they will drop down to anything from 1.8Ah to 2.4Ah. Laptop cells are normally better quality – those snot green ones I have harvested in the? video are 2.7+Ah at 1.8A so better than any 3000mAh cell that you will see advertised in HK.
answer please!! are those REALLY 3000mah?? i meand ultrafire,? and are those better for example trustfire flame 2400mah?? thanx!:D
Correction: that should be? 1700mAh
yes using a digital 18650 charger and subject to the precautions I advise regarding fire risk. They will come up to 4.2v? fairly quickly (2 hours), but they take a few cycles to sustain it.
cheers mate…hacked open another one (“Sony Fukushima STG” !!!) which come out at? 2160 mAH so i guess these are better…could i charge these to 4.2V like you do? thanks again
Sounds like a fairly old pack.. Here are the sums again.
14.8 / 3.7v = 4 Serial
8? cells / 4 (serial) = 2 Parallel
3400 / 2 parallel =? 1700Ah Not great if your mAH number is correct.
nice one, cheers mate
gotta confess im a complete novice with electrics, i got 8 out of my pack (2×4) which said it was 14.8V? / 3400mAH but cant for the life of me figure out the amp hour per cell, which ill need to know when it comes to charging…wont i?? any advice much appreciated dood…!
No Definitely not. Its normally just one pair that causes the whole pack to fail. Sometimes nothing more complex than a faulty circuit. Open them check the voltage, charge them and see? if they will sustain a charge.
can you safely assume that if the battery pack was kaput that all the batteries will be? completely useless/dead?? cheers!