SMARTER CHARGING: ideal for the demanding battery user, our new SmartPlus charger monitors and checks 1-4 AA/AAA (Mignon/Micro) batteries individually as they charge. And thanks to the handy LED-indicators you can follow their progress, or check their remaining energy level. Also, did you know this model comes with a UK plug? Clever! SAFER CHARGING: don't worry about overcharging or charging batteries that need replacing. Our charger is equipped with a premium overcharge protection - DeltaV protection, which means it shuts off automatically before overcharging. And the built-in Battery Life Checker makes sure your batteries are in tip-top condition every time you plug them in. If not you'll know when to replace them. Discover the rest of our new safety features: all assembled on our 100% plastic-free packaging! SWIFTER CHARGING: no time to lose waiting for a full battery? With the SmartPlus charger it only takes 1,5 hours to fully charge 1-2 eneloop batteries. And this combo pack contains 4 of those already, which we precharged with solar energy: our eneloop pro AA/Mignon batteries with a minimum capacity of 2500 mAh*, which can be recharged maximum 500 times*1. Speedy and sustainable! Capacity based on testing method established by IEC 61951-2 (7.3.2).