Originally Posted by Cain
If the company that makes the charger or packs will warranty anything that happens at 2C, would be willing to try them.
I know that Hyperion has info about 2C charging on there newest charger being safe, and I like how they have full data going back to the charger through the balancer, etc.
I just don't understand why all these companies and people are buying into the hype of making more current available to the pack. Based on the theory of operation Your just generating more heat in the cells to try and cheat a system you can do in a much smarter way.
Think of the charger as a battery itself. if the charger is producing a fixed voltage matching the output of the cells (well use 8.4v for example) when the pack nears this voltage it begins to current share with it's parallel partner (the charger) and will begin refusing current exponentially. Sure your going to get it to 90% faster but at the cost of cell life. The last 10% ? Well if the pack is takeing in even 50mah at this point, your only going to force it to take 100mah now.
If you change the chargers voltage output to say 9 volts, and still charge at 1c the pack will be accepting plenty of current by the time it reaches 8.4 volts. I am willing to stake that upping the charge voltage 10% to decrease the charge time as opposed to upping the current available for the first 90% by 100% will have far less an impact on cell life of safety.
A simple firmware update to the chargers would make this so as most chargers that monitor cell voltage can produce one voltage at the output, and check the cell voltage on the fly. Using the 8.4v packs as an example, set the charge voltage to 9 volts, and have it stop the charge when the cells hit 8.4. Lock it at 1c and I'll bet it's the better way to go.
I believe the companies are going the wrong way with this, and I blame it on misinformation and lack of understanding. Remember not all these companies have true engineers developing the technology. Some people are just selling rebadged stuff from china and advertising they are capable of whatever the manufacture states or the kids in the pit claimed they can do with it. It's kinda sad to think about it really.
Not that I'm some kind of god or anything. I just did the research. I built my lipo charger from scratch and the current and voltage are adjustable. When I charged at even 8.6 volts and 1c the last 10% filled up MUCH quicker.