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Review on Smart Battery Charger for 3.7V Li-ion Packs with 4.2V and 1000mA Output: Universal and Intelligent by Jamie Jenkins

Revainrating 5 out of 5

My headlights won't run out of power anymore

I bought this to continuously charge my solar spotlights using two 3.7V Li-Ion batteries instead of the included solar panel. Now I don't run out of charge, and the headlights are mostly on at night. Very happy with this purchase.

Pros
  • Standard 5.25mm x 2.1mm power plug. Output 4.2V, 1A. US standard power plug
Cons
  • Not sure