TEL:86-755-888 553 68
36V 20AH Vehicle
I purchase two 36V20AH Yesa battery at Oct.07,it's used at Vespa/50S Special vehicle,the motor is Mars/Brushless.Total weight is 165KG.
48v 20ah e-bike Battery for e-power challenge 2008. Customer 3: 110U.4820F
I will go to your site but I'm very happy. I have around 300 cycles on
my Yesa pack now and I rode 40 miles at 25.2 mph at the ePower Challenge
2008:
http://www.endless-sphere.com/forums/viewtopic.php?f=3&t=4426&st=0&sk=t&sd=a&start=15
The pack and chargers function very well, though I had to insulate the
BMS during the cold winter months because of the cutout problem. This
was easy to do and it was not worth the effort to return the BMS to you
to reprogram the CPU.
I happily recommend the Yesa products.
Thanks,
-Calin(USA) May.29.2008
With Starting,it needs 15 seconds.And ride on level ground,it can reach 56Km/h Max,and average speed is 40Km/h,it's moved 24Km by charge one time.It's continuous about forty minutes.
I'm very happy with the both the batteries and the customer service.
-Jake(USA) .June.20.2008
48v 20ah e-scooter battery, a great technology compared to lead-acid ! It has been running fine, I'm very pleased with it, it's a great technology compared to lead-acid.
This is a very impressive battery, it really delivers what it claims. I have an Amp Hour meter attached, and it always reads more than 19 AH before the BMU starts cutting out.
e-scooter : home built 1900w
level ground: Ave.speed 40km/h Distance:50km
uphill : Ave.speed 24km/h Distance: 4km
-Nick(USA) May.28.2008
"As an experiment I ordered a 48V 20AH LiFePo4 battery pack from Yesa and I installed in on my Evader 1000 electric scooter. It ways about 14 lbs and I used it to replace 4 SLA 12V 45AH batteries which weighed together around 140 lbs, so my scooter is now about 110 lbs lighter. One problem I have found is that when I accelerate hard, the Evader pulls more than 60A which is enough to pull the volta.
The Evader pulls more than 60A which is enough to pull the voltage below the low-voltage cutoff and the pack shuts itself down. It then stays down for some period before waking up again, it seems. I have asked Sam at Yesa for advice on what to do in this situation.
I have not done a range test yet, and thus far I have only gone a couple of miles at a time. The scooter feels much lighter and the top speed seems to be up 1-2 mph to around 33 mph.
Other user feed back:
http://visforvoltage.org/forum/batteries-and-chargers/1758#comment-10003
