I'm not going to say you "need" a higher quality charger just for your RedWolf, but a true hobby grade charger will give you much better information on your batteries health and also protect and provide better longevity by providing proper CC/CV charging algorithms.
A personal favorite of mine from both RC and a variety of other hobbies is this one:
https://www.amazon.com/SKYRC-Professional-cargador-balance-descargador/dp/B0722NGPBS LiPo 101 time:
LiPo batteries are made up individual cells. Each cell has a nominal voltage of 3.7 volts. You take these cells and put them in series to create packs that you see labelled 2S or 3S. It sounds like your RedWolf pack is a 2S meaning 3.7 + 3.7 = 7.4v.
LiPo packs operate over a certain voltage range which is optimal for its longevity. For a LiPo it is best not to discharge under 3.2v per cell (someone is sure to chime in here and claim a value in the 2.8v - 3.3v range - it's a range, there's no exact right answer) and unhealthy to charge over 4.2v per cell. So your 2S battery is full at 8.4v and 'empty' when it reads 6.4v - thus the nominal rating in the middle of 3.7v.
LiPo also MUST be charged properly. If you charge it with a NiCad or NiMH charger you risk a fire because it uses a completely different charging algorithm. LiPo uses a charging algorithm called CC/CV, which is Constant Current / Constant Voltage. This means the charger applies a constant charge current (regardless of voltage) to the battery until each cell reaches 4.2v. Then it switches to a Constant Voltage where it continues to hold the cell at 4.2v by slowly lowering the current applied to the cell, when the current reaches 10% of the CC charge value it stops and the charge is complete. The CC part puts in about 90% of the charge and the CV part puts in the remaining 10%.
The connector you mention that has three pins is called a balancing connector. It allows the charger to address each cell in the pack individually and makes sure all the cells are charging at the same voltage. If one cell in the pack has a higher or lower internal impedance it will charge at a different rate than the others, the balancer connector resolves this issue.
One last thing and I'll stop rambling. If you need to get a replacement LiPo pack for your RedWolf please got to HobbyKing (
https://hobbyking.com/) and pay $10 for it rather than getting ripped off for $30-$50 for a re-labeled battery. And never buy Valken batteries - absolute garbage.
