Yueling@ 4pcs 18650 Battery + Charger 3000 mAh 3.7V Li-ion Rechargeable Battery for flashlight headlamp Red

Pros:- Price for 4 batteries with charger- Purchased 4 pack for 4 new Cree XML T6 flashlights- With 4 flashlights, investment in 18650 batteries seems more cost effective than constantly replacing a set of 12 AAA’s.- With 18650, light output is a little brighter and whiter than using AAA’s, and the circumference of the lighted area using 18650 is slightly larger, so there is an advantage to Li-ion versus AAA batteries in flashlights with the Cree XML T6 circuitry.Cons:- Charger might be defective because factory pre-charged batteries work in flashlight, and no other reviewers mentioned similar circumstances, read below.Other thoughts:Batteries arrived slightly factory precharged, work in flashlight. Place two batteries in charger, light turns green, plug in wall, light turns red to indicate charging, as it should. After 8 hours, light still red, never glows green again. During charge, neither batteries nor charger feel slightly warm to touch–many rechargeable batteries do. After 16 hours of charging two sets of two batteries for 8 hours each, cannot tell whether batteries are fully charged, or still working in flashlight from original factory pre-charge. Did not feel comfortable plugging charger with batteries in outlet and leaving it unattended for full 8 hours–just in case. Hoping seller responds to my concern and replaces the charger without having to send everything back.Edit: 12/11/2017 Heard nothing from seller, decided to change rating, and return their products for refund.Purchasing new charger and batteries from different sellers.Edit: 12/12/2017 After returning merchandise yesterday for refund, seller responded today offering to send replacement charger. Immediately after returning the merchandise, purchased a different charger with LED display so I could monitor what is happening with the batteries before and during charging cycles. Would consider buying the Yueling product again in the future when needing replacement batteries without the charger.

The package contains a double-barrel charger and four nominal-3000 mAh 18650s. Good packageThe charger is wired and offers an ampere each to the two cells; the cells weigh 1.45 oz each (about twice the usual) and one tested to 2378 mAh from 4.2 to 3.0 volts into a 6+-ohm load, much closer to "rated" than most advertised 18650s. I'm impressed enough that I'm ordering two more sets. Incidentally, I've noticed that commercial 18650 powerpacks (De Walt, B&D, Kobalt, etc.) have built-in cutoffs at about 3.3 V/cell. Bob Y

Exelent quality, this batteries not only look good feel solid claiming 3000mah but a raw test with high drain 3.7v elect. Motor and heavy dragg was shocking, this batteries kept going and goin until i had to stop the.motor due to excess of heat to the motor, batteries felt low warm i tested them to other batteries that claim beyond 3500mah and competition wasnt even close, competition discharged half ways ,simple powerfull great endurance and fast reliable delivery straight from amazon warehouses no 3rd party!!

Great batteries! These last a long time on a single charge. I mainly use these for 2 LED flashlights, and use each an average of maybe 5-10 minutes a day. This is the second set of 4 I have purchased, and the first set has only needed to be recharged once. The first charge lasted about 2 months. I am very happy with these batteries.

the charger is fine but the batteries are slightly taller and do not fit in my devicerendering them useless ,,,,,,beware these may be 18650 batteries but being slightly taller you may have issues with fit.

I'm using these, one at a time, in a laser pointer. So far they are holding up fine. Haven't really had them long enough to see if they will last over the long haul. They seem to charge up to a good, strong level.....laser is powerful and does not fade. Would buy again.

Seemed like a good deal, but the batteries took forever to charge. Never reached full charge (based on the fact the baby monitor showed 3/4 bars). They ran down very fast. Twice as fast as batteries half their size. I returned them.

I liked the price and the batteries hold a charge. The only complaint is that it takes awhile for the batteries to recharge. I would recommend these to anyone liokimg to purchase them.