honestly that's true...but lets put it in context....
all atties will damage stock
batteries.... they amp draw of an atty at a given voltage exceeds the max drain rate of the stock
batteries...this results in a reduction of # of times it can be charged before it won't take a charge anymore and dies....the LR atty is just worse...
example a 1.5Ω LR atty at 3.1V has an amp draw of about 2.07A... even a stock joye atty at 2.3Ω has an amp draw of about 1.35A...
now an ego battery has a max drain rate of about <.65A and the stock 510 is worse at . <.18A....
so yeah the LR will kill the battery quicker true...and you'll get a slightly reduced time between recharges...but really it's all relative...
the only
batteries that it isnt going to overstress by not exceeding the max drain rate of a battery is really only on 3 mod batteries....the high drain IMR 14500 LiMN, the high drain IMR 16340 LiMN, and the 18650...