A charge rate of 1c was pretty much the standard for a long time. For your 2200mah battery this would mean you would charge the battery at 2.2 amps. Silicon Graphene batteries can take charge rates of up to 10c, which for a 2200mah battery would be 22 amps. If your battery isn't of Silicon Graphene construction you can charge at 2c or 4.4 amps without causing any harm.

If you put into a search engine, "What makes a lipo be able to charge at such a high rate?", you'll get some good reading material. You might run into some manufacturer's bla, bla, bla LiPo cell formulation allowing higher charge rates. And then, you might run into a spec class racing thread where battery wars/speed secrets are sought-after. Some packs will have a printed charge rate on label. For years, a 1C charge rate has been "the norm" for safe charging and greatest longevity of LiPo cells. Sometimes I see/read that a 2C charge rate is said to be a great compromise between speed of charge/safety/pack longevity.

+1
1C is how I charge my LiPos.. better safe than sorry.

Charger technology has evolved too, I would encourage you to read the following thread to get a better understanding that there is more involved with simply charging at higher rates:
iCharger Benefits

Not everyone follows all the recommendations, there are calculated risks. It is best to charge your batteries at the same ambient temperature that they will be used. For example, if you charge them inside with A/C around 72°F, then take them outside on a hot summer day above 100°F then a drastic increase in heat will cause the voltage to go up and you risk damaging your cells. I knew of a guy who bought a bunch of brand new packs, charged them up at home, put them in the trunk of his car and drove about an hour to the beach, but discovered that every single pack has swelled up in transit... they were all damaged beyond safe use.

Many indoor clubs allow charging inside the pit room, some require LiPo bags but many don't. The club in my area doesn't have any restrictions and about once or twice a year I will see someone's pack go up in flames inside the pit room which leaves a nasty chemical cloud and smell that remains for days. Sometimes someone can catch it early and grab the pack by the wires to get it outside before flames erupt, normally smoke billows for about 10-15 seconds first, but if you move too slow your best bet is to kick the pack while it's a burst of flame until it's outside. Every case that I saw where a pack caught on fire was due to abuse, either the pack was severely ballooned and eventually punctured or they over charged their pack by accidentally leaving their charger in NiMh mode.

There was one guy I know of who stored his packs in his hot garage in the summer and one of the packs had spontaneously combusted which set off a chain reaction to the other packs which burned down his garage... total loss of the garage and all its contents

Always discharge your packs to storage mode when not in use and minimize the time they are fully charged, heat is your worst enemy... as soon as the packs start to swell/balloon, then it's time to discard them!

2200mah is fairly small. I charge little Tx and Rx packs at 1c. More if it's a well used little airplane battery.

Race packs though, 40amps.

Gently charged lipos burn as often as anything else. We've nuked plenty of 1c and 2c batteries. It's easy to blame the charger. Way easier than the 100+ g force from crashing, or overloads caused by poor maintenance or damaged bearings.

manufactures put the charger outside.due to the venting a lipo can do. The smoke is Toxic and the smell is bad and if it vents indoors more chance of fire to spread and you wont get that smell out .Heard even stain killz wont work.

I never charge at any more than 2c and I have never vented a lipo while charging..I have seen guys a few years back puff and then vent a lipo when a few lipos had waring on there boxes dont use certain chargers but they dint read warnings.. Orion batts had a warning dont use MRC chargers seen a guy puff 3 lipos . then he asks me why I said did you see warning on side of box (he said no) if the ir gets to high for my liking or I notice a performance lack I trash lipo and replace.

IMO, the climate of the location for storage is more important than if they are in a safety bag/box. There are storage boxes you can buy, but you'll want to keep them in a cool, dry (moisture free) location. I've heard of some people storing them in freezers but that seems silly with lipos. That was what people did in the 80's with alkaline batteries. That being said, no reason not to store them in something secure and safe.

When LiPo's first came out, I had experimented with storing them in the freezer and it was very impractical. What I found was that condensation would form after pulling them from the freezer and if you have any level of humidity then rust will form on your exposed metal in no time! It is important to store your packs below 77°F:

https://batteryuniversity.com/learn/...ased_batteries

I feel that anything below 25°C / 77°F is reasonable storage with the expectation of replacing my packs every 6 months to a year:

First, lithium batteries very rarely ignite. Think of all the millions of cellphone batteries out there that are lipo batteries. Some common sense will keep you safe. First if you're out running and you have a massive crash, one that makes you wince, then you should inspect the battery. If it's damaged, then better safe than sorry. Even if there's no sign of damage, leave it someplace outside for a couple of hours just to make sure.

You should always check the temperature of your battery after a run, if you run them hard. If they are really hot on the outside of the case, they are even hotter inside. Let it cool in a safe place.

The lipo fires I've seen were mostly due to operator error during charging. And in every case I can think of, they were the result of someone borrowing someone else's charger that didn't know the proper operation. The other one I can think of was due to a wire either coming unsoldered or some other short on the battery side that cause the battery to go into thermal runaway.

I've been using Lipos for about 8 years without any incidents, those I race with the same with one exception of the "using the charger wrong"

There are difference between LiPo, LiFePo4 and Li-Ion, LiPo is most unstable... In cellphones Li-Ion is used.....

LiPo is short for Li-Ion Polymer:
https://en.wikipedia.org/wiki/Lithium_polymer_battery




What makes cell phone LiPo's less dangerous is having significantly less "energy density"...

NiMH batteries were just as dangerous and would also catch on fire when abused, but the energy density used back then were just a fraction of the energy density we are using in our cars today.

Leaving your packs in storage mode will also reduce energy density as well

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