Hi People new around here; my son and I have been playing around with some cheap pistols and a few months ago we purchased a Double Bell M4SS anyway what is a good charger/balancer we only have a cheap USB charger it has a red light when charging then the light turns off when charged.
Whenever I check, one cell always seems to be out of balance
Looking for something with a little more info that can balance as well what everyone using any info would be awesome.
Sky RC b6ac. If you are serious about getting into the hobby and looking after your batteries, get one. They aren’t cheap but have a balance charge option that is recommended, and a storage charge option that if you are not using your battery for a week or longer use that, and it will balance the cells to 3.85v, for optimal storage charge to increase the lifespan of your lipo or li-ion batteries. I have a few lipos that are nearly 5 years old, and still good as I have always storage charged them when not in use.
Thanks Rocksolid much appreciated 
Handy little video for you, also shows the cheap little digital battery testers that most of us use as well
They are available in 2 types to suit your requirements.
If you want something for outdoor activities, they have a 12V version that you can use off your car battery…… or if you are going to be doing most of your charging at home, they have a mains power plug in one as well.
Make sure you check which type you want when you order one 
Thanks, guys placed an order for hopefully a genuine Charger
DocBob has two Imax B6 chargers for sale in the buy/sell/swap category on here… one ridgy didge, the other not so didge.
Probably too late if you’ve already order yours. 
Thanks mate!
Going to keep the genuine one for possible future NERF ventures, but still have the copy one available, which has always worked faultlessly
Thanks, Everyone, yes; now sorted, and thanks for the video DocBob it helped a lot.