To put it in perspective, I consider myself an average vaper ...and I usually get about 8-12hours on a 1000 mah twist (depending on the voltage setting),a 350 mah would last about one third of that time, or about 3-4 hours,if you want one
device to last you all day, you want something bigger, if not, be prepared to carry extras and/or chargers everywhere you go.
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