So. Today i went to Action Hobbies with 4x BY Energy Batteries:
3x 25C-4,200
1x 35C-4,200
All 4 batteries were bought from Action Hobbies over a period of about 6 months, each time i buy 1 battery, so likely that the batteries were all from different batches produced from the factory.
At the shop i showed them the 1 battery i already opened. then i disassemble one of the 25C-4,200 batteries. To my surprise, this battery didnt contain any mah rating on the cells, just a serial no. 8042125, then i opened another 25C-4,200 battery and this one contain the identical 3,800 with serial no. I did not open the 35C-4,200 battery because, i found that this battery performed much better and was able to take in around 3,8xx mah on recharging.
When 馮馮ymc turned up - 1 hour later than the time i arranged to meet him at the shop, he was very nice and apologetic, explaining that it must have been an error at the factory, and then exchanged all 4 of my batteries for new BY Energy 35C-4,200. when looking at the case of my 35C-4,200 battery, 馮馮ymc said that it was a old batch and it was better to change it as well.
ford - your 35C-4,200 battery looks the same as the ones they replaced my batteries with.
from your picture, i can see that the case has little dimples in it. I presume that this is a marking showing it is the newer version/batch, as all of my old batteries did not have this.
The Result: All 4 batteries were exchanged for new BY Energy 35C-4,200.
The Conclusion: Are the new BY Energy 35C-4,200 batteries any good? will not know till i use them for a while. All i can say is, if you have a BY Energy 25C-4,200 battery, the chances are they are only 3,800mah. Action Hobbies does not sell the 25C version anymore. 馮馮ymc did mention that he would make a post on the forums. I can only hope that he will exchange all the 25C-4,200 batteries for 35C-4,200 without having to open them in the shop.
when i recharged my BY Energy 25C-4,200 at 1C(4.2A), i could only put in 3,400mah charge back into them (my lipo cut-off set to 3.4V). so if this is the same case for you. then call action hobbies and arrange an exchange.
Good Luck to all those with the 25C-4,200 batteries.
I will make a post in a few weeks to give me evaluation of the newer BY Energy 35C-4,200 batteries.
If you have any problems with your BY Energy battery, I advise you to take it back to the shop you bought it from. This includes balancing problems. |
樓主: xiang
樓主
鬼叫貪平比 se 400 20c平 40蚊 , ヌ比ip平 80蚊
