Sinopoly Cells - Info -

[Burgerman]

Connect say 4 together at a time, and charge at full power. At a typical 50% charge that will take 5 hours, twice?

And you have 3 chargers!
So connect 2 together at a time or 3... Charge at 40A each charger.

[expresso]

thats true - i actually have 3 chargers - i got an extra just in case - its in the closet for a backup - with 12 PSU -

i can use the two chargers - at the same time - i though it was best to do ONE Cell at a time for the first time - - actually they suggest to connect them all together and charge first time this way -

instead of 100ah 3.2v cell - make a large 800ah 3.2v pack and charge - unless i am mistaken -

i figured it would be best to do one at a time for the very first charge -

4 at a time dosnt sound bad - with 2 chargers - will be done same day -

even one at a time will make this build alot faster than using the 56 headways a few weeks compared to a few months or more

i still like the headways - but i look forward to hearing your results once you test them - i scraped doing this chair with the head ways - but now with these cells - i am going to revisit the idea - and itching to do it at some point

[Burgerman]

We did each headway seperately with the same cut off terminal current so we knew they were all charged to the exact same level.

Thats because we then measured the refill after a month. So we knew the discharge rates to assemble sets of cells that had the same average discharge rates. Since we cant do that with 1 cell per group (because they are 100Ah already) then anything close to full is adequate. Because the final bit will be balanced by the PL8 on charge once assembles. What we cant know is if each 100Ah cell has equal self discharge rate over time. If it doesent, then storing the chair will put it more out of balance faster. If we are lucky it will be fine. If we are not then we may need to top up charge more often to balance it up.

[snaker]

Has anyone actually used these before? It's a lot of money to spend for crap batteries.

I built a 150Ah pack (138Ah in reality) by prismatic cells bought from taobao. Until now it works fine and I am enjoying the very long range it offers. My trips are usually 80km or more and there are still many unused Ah. In coming days, I will drain the pack to see how far a powerchair could run in a single trip.

[expresso]

80km is about 50 miles - thats a long ride - you beat me for sure

what time do you wake up and go out to ride - what time do you return ?

its great though

[snaker]

My time is 05:00 wake up, 07:30 go out, 15:00 get back home.

I am driving people in my family mad. They do not like that I go alone in long time

[LROBBINS]

Expresso, If Snaker's schedule seems awful early to you, do remember that Vietnam is a tropical country and it gets exceedingly hot in the afternoon.

[expresso]

My time is 05:00 wake up, 07:30 go out, 15:00 get back home.

I am driving people in my family mad. They do not like that I go alone in long time

what time is that when you get back 15:00 ? i am not good at translating military time - would that be around 5 pm in the evening ?

yeah i get the same thing here about going alone for so long and far - but what can you do - you are most likely the only user in your country with lithium - so your stuck going alone like i am here also - i may have some company this summer - i am putting my ADD ON 36ah pack on my friends chair - she wants to try it out - so maybe she can ride along this summer on some of the trips - she will still have to take a bus at least up to the bridge in order to ride the whole trip i take - ADD ON alone is not enough - but if she takes the bus up to the Bridge first - saves a good 9 miles -

i am the only person i know that is using lithium here in NYC - so i have to go solo

[Burgerman]

3

[expresso]

Expresso, If Snaker's schedule seems awful early to you, do remember that Vietnam is a tropical country and it gets exceedingly hot in the afternoon.

yeah i guess it would be different - i just cant get up early and start rushing etc, to get ready - i try hard to get out of the house around 11 am to do the long rides in order to get back around 5pm or 6pm - but i have to try to get started earlier this summer on some trips just to try to break the 44 mile mark - curious if i can get 50 miles out of my 135ah battery -

i know i have to get up and out by about 10am i think

i usually dont end up falling asleep till about 2am or 3am - i am in bed by around 12:30am but dont fall asleep that fast

[expresso]

3

7:30am till 3pm ? about 6 1/2 hours then -

i can try to get out by 10am - thats very early for me but i will do it this summer

[firehopper]

3

7:30am till 3pm ? about 6 1/2 hours then -

i can try to get out by 10am - thats very early for me but i will do it this summer

actually 7:30am - 3pm is approx 7.5 hours.

[expresso]

3

7:30am till 3pm ? about 6 1/2 hours then -

i can try to get out by 10am - thats very early for me but i will do it this summer

actually 7:30am - 3pm is approx 7.5 hours.

yes my bad - long time -

[Burgerman]

Not sure I dare do more than 4 hours at a time or pressure ulcers will return. But once I get the motor fixed on my BM3 chair, as soon as my finances allow, I can do 16 miles every hour. So 4 hours would be 64 miles as long as I dont stop or slow down. But I would need to unless super smooth.

I am hoping it all comes together and a nice warm sumer day, to enter a local 26 mile marathon. And win from the back... At the last few hundred yards. For comedy effect.

And will just have to video it. Expresso can do the new york one if he enters soon. Not sure if he can win it though. What average speed do the winners do?

Looks up google...
The Olympic men's record is 2:06:32, set at the 2008 Summer Olympics by Samuel Kamau Wanjiru of Kenya (average speed about 20.01 kilometres per hour or 12.43 miles per hour).

So it MIGHT just be possible if the world record runners have a bad day. Either way he will be in the top few.

[expresso]

Not sure I dare do more than 4 hours at a time or pressure ulcers will return. But once I get the motor fixed on my BM3 chair, as soon as my finances allow, I can do 16 miles every hour. So 4 hours would be 64 miles as long as I dont stop or slow down. But I would need to unless super smooth.

I am hoping it all comes together and a nice warm sumer day, to enter a local 26 mile marathon. And win from the back... At the last few hundred yards. For comedy effect.

And will just have to video it. Expresso can do the new york one if he enters soon. Not sure if he can win it though. What average speed do the winners do?

Looks up google...
The Olympic men's record is 2:06:32, set at the 2008 Summer Olympics by Samuel Kamau Wanjiru of Kenya (average speed about 20.01 kilometres per hour or 12.43 miles per hour).

So it MIGHT just be possible if the world record runners have a bad day. Either way he will be in the top few.

that would be wild - i never though about entering any kind of race - but how does that work - i mean someone in a chair can race with the others who are not ? i would think we have a big advantage - but maybe not - my Avg. speed maybe can be around the 10 mph mark - more or less - between the lithium - higher volts and the tires - stock its 8.5 - i have seen 10 easy with GPS before -

BM with your speed - you would win for sure i would think - who can run that fast for the long run steady - or if theres a wheelchair marathon of some sort - i am just enjoying the Range and speed is nice - i be honest going too too fast isnt that great unless you have alot of ground to cover and its flat open long road - or else its more work to handle the chair in the city at speeds - many times i slow it down within the city till i am out in the open more - 8 mph is a decent speed to keep all the time - or even 7.5 etc, for in the city - 7 the slowest to use - after that its just too slow for me

[Burgerman]

You just enter for fun. Your time wont mean anything since you are powered. But they wont expect it since other chairs cant complete the course. There will be lots of race manual wheelchairs. Some of those win...

[expresso]

You just enter for fun. Your time wont mean anything since you are powered. But they wont expect it since other chairs cant complete the course. There will be lots of race manual wheelchairs. Some of those win...

not a bad idea for fun - i have to look into it - no rush - A Neighbor here in a manual used to race - he was the first to race and win when they started to race - he showed me his pictures going over the Bridge not sure which it was now - hes in great shape still now - hes out and about early in the morn. - for his age which i am not sure what it is - but hes in his late 60s i believe and strong - dosnt look it

yeah i would guess no Lead wheelchair would win for sure or even finish the race - maybe i can manage to at least finish it - if its under 40 miles - i could have a good chance at finishing

[foghornleghorn]

London Marathon wheelchair record is 1:28:57 - a manual wheelchair going even faster than your BM3 could do it in!

[expresso]

London Marathon wheelchair record is 1:28:57 - a manual wheelchair going even faster than your BM3 could do it in!

true - they can go pretty fast and for long time - i can at least finish

[Burgerman]

London Marathon wheelchair record is 1:28:57 - a manual wheelchair going even faster than your BM3 could do it in!

Those race manual chairs are very fast. Or rather the ape driving it is. What is that in mph 17.52? Bugger! Yes but thats a record. So likely 16 will be enough. Esp if I get in the way a bit on fast downhill bits!

[shirley_hkg]

Average speed and top speed are really two different things . I pointed out long before he set out , that expresso could only do an average of 10kph .

Snaker is definitely a RECORD , that he pushed the stick for 7 hours ''NON-STOPPED ''.

I sneaked into the 2008 marathon here . It was boring , as you were un-accompanied throughout the game .

[expresso]

he sure is on top of his game there -

maybe he should look into the Guinness records etc, - i always wondered how that would work -

would they ride with Snaker and record the whole thing ? he may have a record he can get in the books

[snaker]

Riding in long time is not that hard because our speed is VERY slow therefore our brain does not need to work hard. Unless we have a chance to drive BM3 at 26kph

And pushing the stick continuously in 7hrs or more is easy too. The key is that we have to find and locate the joystick pod at the right position. Once we feel comfortable with it, we can push the stick a whole day without feeling tired or hurt.

[ex-Gooserider]

You just enter for fun. Your time wont mean anything since you are powered. But they wont expect it since other chairs cant complete the course. There will be lots of race manual wheelchairs. Some of those win...

I'm not sure what the W/C record is for the Boston Marathon, but I know that they start the W/C racers well before the AB types, and the W/C time is MUCH less than the runners. I seem to recall hearing that the race chairs can hit upwards of 30-40mph on some of the downhill stretches, so BM needs to figure out how to do a 100V pack if he wants to roll with the fast crowd

Also worth noting that the top W/C racers are usually the leg amps, they sort of socket into their chairs like the old PlaySkool toddler toy dolls, and have the advantage of saving 30-40 lbs in non-working leg ballast off us SCI types...

ex-Gooserider

[Burgerman]

I could fit a freewheel. But I am not cutting legs off to win a marathon.

[expresso]

i guess i wont be winning any races then - i never though about those manuals - they do go fast and now you mentioned downhills -

i was thinking more along the lines of a wheelchair marathon - power only ? i never factored in the fast manuals and even fast runners -

[Burgerman]

They only go really fast downhill. Like a bicycle. Uphill is like, oops, whats gone wrong. Also like a bicycle! So on uphills you win. On downhills just make sure you accidentally get in the way a bit

[shirley_hkg]

[expresso]

whow - this may change everything now - those will fit in the same size of the group 24 - how much are they ? now that i would love in my chair 170ah

[Burgerman]

These things appear!

But as usual, no supply available!

Also uninsulated. So casing is negative... Causes issues making a pack.

I would still be interested.

IF theres a regular reliable supply of new cells. Would nylon dip every cell. About 5x over to be sure. And seperate with 1mm plastic card, and 3mm on the base. Tape the lot up with duct tape. It will then be safe. These will be low C rate. So a large pack is essential. So you NEED 170Ah. But will work. So then...

From MK 73Ah you get about 40 to 45Ah out. So these will give 3.5 to 4 times as much range.

HOW to order 8?