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I buy a lot of these batteries so I have bought the necessary equipment to test their actual capacity. The current industry standard is Panasonic NCR 18650 GA 3500mAh which typically gives over 3500 mAh. Unfortunately there are a lot 18650 and similar batteries on eBay and elsewhere that grossly exaggerate their rating and range from pure fake to good quality but exaggerated capacity. One of these is the Boruit 18650 4000mAh batteries which in my tests have given me only 1400 to 1500 mAh, charging at 1000 mA and discharge at 500 mA. There are other cheap ones such as Loviss 4600 mAh with a price of around 1/3 to 1/2 of the Boruit batteries that typically give me well over 2000 mAh. It is luck of the draw. I normally buy 1 or 2 first and test them before ordering more of the same type. I use these to refurbish electric bicycle batteries and drones as a hobby.Read full review
Verified purchase: No
great quality super power 4000ah
Verified purchase: Yes | Condition: New
Its OK as a battery goes except the wall charger " long to charge"
Verified purchase: Yes | Condition: New
Don’t know about quality yet, time will tell. They are genuine replacements for my head light.
Verified purchase: Yes | Condition: New
Items seem to be of good value. Recharge well at this time and last in headlamp for a long period of time with good light.
Verified purchase: Yes | Condition: New