Nitecore Rechargeable 18650 Li-ion Battery (4000mAh)

The Nitecore NL1840HP is a high-performance 4000mAh rechargeable button-top battery that is designed to be used in high-drain devices, such as underwater flash units.

Nitecore Rechargeable 18650 Li-ion Battery (4000mAh)
Nitecore

It has a voltage of 3.6V (14.4Wh), a continuous discharge current of 10A, and can be recharged over 500 times, making it cost-effective and environmentally friendly. It has a built-in intelligent protective circuit and a pressure relief valve, which safeguards it against overcharging, over-discharging and short circuits. 

What to make of which batteries to use or not to use underwater

Photo & Video

Our good colleague at Wetpixel, Adam Hanlon, recently reported that the extremely popular Eneloop rechargeable batteries are now not recommended for underwater strobe use. Panasonic, who owns Eneloop, specifically states on its website "Please do not use Eneloop Ni-MH batteries in underwater lights or other airtight appliances." Adam mentions it could be interesting if the strobe manufacturers have something to say, otherwise we’ll all keep using Eneloops as usual. It could indeed.

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