The lithium cylindrical cells are usually 18650, 3.7 volt with varying MaH ratings but some may be flat rectangular instead to save space. China has flooded the market with over rated MaH lithium batteries so it is very difficult to say how good any are. Cells are wired 3 sets in series with 2 or 3 in parallel in each set to make 11.1 volts. 6 cells looks like this: += = = with a connector between each parallel set (=).
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Beware of 9 cell batteries that actually only have 6 cells inside. I took an old one apart to find 3 empty plastic tubes in one. The less batteries, the less total current and shorter charge life. I weighed the 18650 cells so 3 weigh about 100 grams and that should be the difference from the weight of the original Dell package if they are 6 cell.
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Beware of 9 cell batteries that actually only have 6 cells inside. I took an old one apart to find 3 empty plastic tubes in one. The less batteries, the less total current and shorter charge life. I weighed the 18650 cells so 3 weigh about 100 grams and that should be the difference from the weight of the original Dell 9 cell package if they are only 6 cell.
A recent purchase also indicated 6 cells when it refused to charge up to over 66% or about one hour short of ever being 100%. It NEVER fully charges! The seller is sending me another one for free to try and I can keep both if one works correctly. If not, I can send them back for free and get my money back…that is a decent seller which is rare.
The lithium cylindrical cells are usually 18650, 3.7 volt with varying MaH ratings but some may be flat rectangular instead to save space. China has flooded the market with over rated MaH lithium batteries so it is very difficult to say how good any are. Cells are wired 3 sets in series with 2 or 3 in parallel in each set to make 11.1 volts. 6 cells looks like this: += = = with a connector between each parallel set (=).
Beware of 9 cell batteries that actually only have 6 cells inside. I took an old one apart to find 3 empty plastic tubes in one. The less batteries, the less total current and shorter charge life. I weighed the 18650 cells so 3 weigh about 100 grams and that should be the difference from the weight of the original Dell package if they are 6 cell.
A recent purchase also indicated 6 cells when it refused to charge up to over 66% or about one hour short of ever being 100%. It NEVER fully charges! The seller is sending me another one for free to try and I can keep both if one works correctly. If not, I can send them back for free and get my money back…that is a decent seller which is rare.