The 18V LXT Makita batteries that are "double thick", i.e. every battery except the "single thick" 1.5AH batteries are 6S2P. The 1.5AH is 6S.
All of the 6S2P batteries ignore the parallel cells and treat as 6S. Are the cells closely matched at the factory to make it irrelevant? I don't know, but I am certain there is better battery management with the competing dewalt and milwaukee alternatives.
I have a 2.1Gal AC/DC vac, x2 36v chainsaw, x2 36v trimmer and back pack, lots of shop tools.
I just wonder who if anyone will be first to denounce Lithium Ion and offer backward compatible LiFePo cartridges. Cheers ?
Two cells connected together are always treated as a single cell. Doesn't matter if its a 4ah battery or a 1000 ah battery made of 100ah paralleled cells..
When the pos and neg of each cell is connected, they will always be at the same voltage.
Even in electric vehicles, multiple cells are paralleled and treated as a single cell.
If one of the paralleled cells becomes weak, it will drag down the other paralleled cells some, but the unit will continue to function. The only time its a problem is if one of the cells goes totally rogue and shorts out or has some chronic leak..
No way around this.
When it comes to power tool batteries specifically, there are a few things you can do to make them last as long as possible.
1) Never store them fully charged.
2) Put them in the refrigerator if they're not going to be used for a while.
3) Never leave them in a hot car our out in direct sunlight.
4) Use the slowest charger you can. Fast chargers are horribly bad for batteries.. sure, they get you back to work faster, but they also cut the life expectancy of the battery by significant amounts.
Heat and high voltage are the enemy of all lithium batteries with heat being the #1 killer.
My Makita packs are black.. which seems stupid to me.. They should be made of a white plastic so they don't heat up in the sun.