mosty li-on batteries will have both low voltage, high temp/current cut off points designed into the batterys chip set. this is because li-on battery chemistry will fail if the voltage drops to low or they over heat, this is why you get a sudden power cut when in use. The makita batts were designed to cut out and you needed to put them back into the charger to reset them i think, but it had some problems so they changed the tech and newer batts with the star on them are better protected from heat.
Li-on batters will also degrade over time even if not used (alot more that nicad type batts, and can also be effected if stored in high temps so need to be stored in cool place in the summer.
as regards core drilling, a 36v sds will do some small coring, but anything large you need a corded core drill. why wear out an expensive drill when a cheap corded will do the job for longer.
Li-on batters will also degrade over time even if not used (alot more that nicad type batts, and can also be effected if stored in high temps so need to be stored in cool place in the summer.
as regards core drilling, a 36v sds will do some small coring, but anything large you need a corded core drill. why wear out an expensive drill when a cheap corded will do the job for longer.
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