badnewswade wrote:......... I've calculated that the 30ah Ping might - if I was lucky - give me the same range I have with my 48ah SLAs, only it would cost several times as much. To get an actual improvement in range I'd need to spend at least £1000 and buy two 20ah units.
Are you sure ?? just looking at Pings site he suggests you could get away with a 15ah set on a 800w motor scooter, although he recomends 600w, which means a 20ah set would be more than ample, I recon you'd be surprised with them.
badnewswade wrote:.........
I have heard a lot of good things about Pings and they would be my first port of call, however someone in my area bought two massive Ping packs and the BMS on one of them was completely shot. While Ping was great about sending him a replacement, he now has to fit this himself which is the mother of all DIY hassles. Basically he has to solder a thousand quids worth of battery to this cheap-looking BMS all by himself.
Bit of a bummer
![Crying or Very sad :cry:](./images/smilies/icon_cry.gif)
defo that, I would be equally hacked off if that had happened to my dinky £250 pack, thing is you have to remember what your getting for the price, I dont think theres still nothing out that even comes close to supplying a battery and BMS AND charger for the price so even if I had to re-solder the BMS back on I'd still think it was a bit of good deal, but then I'm quite a soldering iron weilding fiend
badnewswade wrote:.........
Also, word on the street about the lifetime of Liths is that they quit on you after about three years. I just don't like those numbers.
Not convinced by that TBH, I've got some consumer electronic stuff runnng Li-ion cells and some are now 10yrs old and still return something like 70% of their capcity
![Cool 8)](./images/smilies/icon_cool.gif)
from phones to camcorders to cameras, all still working fine on their orginal li-ion units, the main issue seems to be they dont like being left either fully charged or flat for months at a time
![Neutral :|](./images/smilies/icon_neutral.gif)
, leave them at around 50% if your not looking at using them for several months or even a year and they just keep on going, recently just bought my wifes Samsung D600 mobile out of retirement, the li-ion battery had been ran to about 50% before being taken off the phone and put away in a cupboard for the last two years, up until then it had been in daily use for 3yrs.
Even after all that time the battery was still able to boot the phone and show a couple of "blobs" on the display so charged it up and off she went, wifey says theres no difference from the day we put it away
I'd love to be able to buy a 48v back and give it a whirl on the bike to see how you got on with it as I recon you wouldnt want me to take it away
![Laughing :lol:](./images/smilies/icon_lol.gif)
certainly no ones going to take my 24v 15ah pack off me, its amazing.
ChrisB