5PCS 3.7V 300mAh Lithium Battery with 5 in 1 Charger for JJRC H36 E010 GoolRC T36 NIHUI NH010 F36 Quadcopter Spare Parts Drone

Nice and small and works really well on my RC planes with small battery comparents.

Doesn’t live up to its 300mah rating, more like 210mah.

They're just not good batteries and have much shorter life than the original. Using on a drone, battery lights are flashing before the drone reaches max height.

1st I would rate these a -5 if I could. I’m not one to complain or write negative reviews. I usually give 5 stars if the product just does what it’s suppose to do. I returned my 1st order because two batteries were 100% dead the others the charge lasted 15-20 seconds max. I read others complained about these batteries sold from the same seller I bought from the 1st time. I bought the same batteries but from a different seller. I checked the voltage before I did anything, they all read 3.8. Volts perfect for storing. Good so far so I charged them on the nifty little charger that’s included. 30 min or so lights went off meaning batteries are charged. Checked them all read 4.1 which is a very safe charge level. 4.2 is max.Well the light came on & my quad lifted and stayed airborne for maybe 10 seconds low battery flasher was flashing and it was done. Not sure what the problem is as the voltage was not low , above 3.7. I have similar batteries that are only 200 mah and I get 4 min of flight out of them. I’m using these on a mellow brushed motor indoor quad no heavy load or fast discharging needed . These are just pure junk. Been in radio control hobbies since 1974 and these are by far the worst batteries I’ve ever seen. They should not be allowed to sell such crap, To the sellers your going to ruin your business selling these batteries., do yourself a favor take a little loss and toss these out. Even offering a refund doesn’t solve the problem or the faith your customers will have in the future buying from you. I know it sounds harsh but just being honest.