Just be aware that there are ramp up issues when running in TC. In power mode, it's fine (except for the finish, which can chip easily).
Disclaimer: I do not have the 200, but I do have the 120, dripbox, dripbox 160, and kbox 70...
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as a general rule yes. some box mods do balanced charging though but I doubt the kbox is one of them.I have heard the USB charge with the batteries being in series is not a good idea