These Slim Joycons come with the latest Firmware installed & have Zero Dead Zones!
Whilst still Bigger/Better than the standard joycons, they are smaller / slimmer than others on this page. (see pictures for comparison)
Controllers will be charged whilst Docked (Yes, they still fit fine in the dock) or charged via a Supplied 1 x USB-C cable. (Check my store for Dual USB-C charge cables)
Built-in 500 mAh batteries on each side, allow you to play for approx. 6-8 hrs nonstop (They will recharge from Switch if depleted) after fully charged and only take 2-3hs to be fully charged once on the switch dock or via supplied USB-C Cable.
FYI: BinBok/NYXI/DOYOKY = Same. None are compatible with Amiibo