gigaplex

iTrader: (2)

"Only" 10A on the mains cable? Typically North American mains are usually only rated for 12A-15A or around 1400W-1800W. I factored in the AC vs DC current ratings when I made my initial post.

Also, your math seems off. 700W on 220V is about 3A, and on 120V is close to 6A.

Roelof

On a Dutch RC forum there was once a talk about a report from the fire brigate why it was difficult to fight a fire of a car. After an investigation they find out the hybrid powered car had lithium batteries and the fire brigade did not had the right stuf to get it out. They concluded there was not enough information about lithium fires.....

chuck_thehammer

.
10 plus years of production.. and the number of major Fires caused by burning lipo..?
.
personally I know of ONE... an it was 10 years ago...
except for the lost of the battery and a burn spot on the table ( indoors )....

gigaplex

iTrader: (2)

We've had a few lately in Australia. At least one of them involved some significant property damage (either house or garage, don't recall).

Roelof

Samsung Note 7 !?

the rc guy

track workers do patrol the pits in many locations I race in regularly.. if they see you go hitting button on there way to you . Your outa there NO bull hit the door BYE.. 70 amp OK..lol
Larrys RC had 3 in 2 months the enacted Rules not more than 2 C charge rates.

Roelof

For sure the guys who switch their charger(s) off when not using them are the ones to keep in sight.

chuck_thehammer

different animal... different charger.

Xpress..

Why would a 40 amp charge rate be considered dangerous? The battery manufacturer sets the recommended max charge rates that are safe for the pack so as long as 40 amps is within that range then there's no real danger outside of the inherent danger of LiPo packs in the first place.

the rc guy

A list of LIPOs that require a 40 amp charge rate. that are 4900mah?

gigaplex

iTrader: (2)

Even the high current lipo packs such as Protek that advertise being capable of 10C charge rates recommend sticking to 1C. 40A is a lot of current for such small batteries.

urnotevenwrg2

iTrader: (1)

Here is one. Actually that pack is good for a 10C charge, which means you can safely charge it at 49 amps. I use their 3600mah pack and charge it at 36 amps with no problems.

urnotevenwrg2

iTrader: (1)

Yeah, they recommend the 1 C charge rate for longest pack life. People that get into high current cycling know that it decreases pack life. The performance gains are worth it to some. Whether all those people can actually translate the performance increase into faster lap times is another thing entirely.

Roelof

You think? It is a same type of battery at a normal charge rate. OK, the cause is a simple swallow of the pack hitting a sharp edge on the inside of the phone.


On that Protek battery that can handle 10C charge:

4 or even 5mm connectors are not able to withstand such a high current. Even the soldering inside the pack as the small aluminium solder tabs will burn through at 490 amp.

So you do trust the 10C charging rate with a mentioned 100C countinious(!!!!) discharge rate.

Xpress..

There is no battery that requires any sort of charge rate, charge rates are entirely up to the end user. All I am saying is that if a battery manufacturer claims a max charge rate then it is entirely safe to assume that the battery will more than likely not erupt at that rate any more than it would at a lower rate.

FYI, my ThunderPower 6s 5000 packs were rated to handle a 60amp charge rate (12C) max and I did so every charge for well over 200 cycles with no noted decrease in pack performance.