I'd suggest 2 batteries, so when one needs a recharge you aren't stuck waiting.
Two lg hg2 would be a decent starter pair:
LG HG2 18650 3000mAh 20A Battery
I wouldn't drive the hg2 battery to 75w, but they're fine to 60. (It'll likely be some time, if ever, before you want to go to that power)
For a charger I might recommend going with an xtar, like:
XTAR SV2 2 Channel Rapid Battery Charger
There are certain companies known to do charging well. xtar and nitecore are commonly recommended.
Two lg hg2 would be a decent starter pair:
LG HG2 18650 3000mAh 20A Battery
I wouldn't drive the hg2 battery to 75w, but they're fine to 60. (It'll likely be some time, if ever, before you want to go to that power)
For a charger I might recommend going with an xtar, like:
XTAR SV2 2 Channel Rapid Battery Charger
There are certain companies known to do charging well. xtar and nitecore are commonly recommended.
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