and Li-Ion batteries last longer than other types of batteries as long as you do not charge them fully and do not allow them to discharge completely; in other words: if you do not recharge your Li-Ion battery shaver to 100% and do not allow it to discharge to "0"(that's when the shaver stops completely), the cycle of charges (numbers of charging times will increase considerably) as said if you keep a fluctuation of charging your shaver between 85% to 90%(not 100%) and stoping your shaver to get discharge to "0" before plugging it into sucket, the life span of your shaver battery will also increase; to say if the Li-Ion battery of your shaver is to last just 500 charges in its lifetime, doing this of not charging fully and avoiding discharging it to "0", you will increase the charging cycles from 500 times to 700 times you can charge your shaver, obviously, the capacity of the charge of the shaver will drop to 80% (it means if when new, the capacity power of your shaver gave you 15 shaves=2 weeks in a 3 to 4 minutes per shave), the time will be reduced to one and half weeks of shaving time of 10 shaves; I have followed these rules with other types of batteries in previous shavers and believe me I have had rechargeable shavers that lasted me more than 10 years with the same batteries, cutter/foils, and heads, as I do clean them deeply and lubricate them often, all those rules and caring for your shavers, pay off.
I replaced my 14500 lithium ion shaver battery with a new higher rated battery and the battery does not get enough of a charge to last very long. The charge lasted a real long time when i initially charged the battery out of the shaver with a good charger. I have tried different chargers with no improvement.
