Nikon Speedlight SB-700 - Manual (Page 17)

A–17
Preparation
A
When using standard size (AA, AAA, C, D) or other common 15.
rechargeable batteries such as NiMH batteries, or when
recharging them, be sure to use only the battery charger
specified by the battery maker and read the instructions
thoroughly. Do not recharge these batteries with their
terminals reversed in the charger or before the batteries
have cooled off sufficiently because they could leak corrosive
liquids, explode or catch on fire. The same caution also applies to
using the rechargeable batteries that may be supplied by the photo
product’s manufacturer.