Woosh starts shipping Tongsheng TSDZ8 with 250W label

[Az.]

You have to remember that you only get around 75% of the power when your battery is empty compared with when it's full.

Also TSDZ8 goes into power saving mode when battery is low on charge.

 

[Percypig]

Does the display show when it's in power saving mode?

 

[Az.]

Does the display show when it's in power saving mode?

I am not sure. I don't think so. I don't look much on display. I also rarely deplete battery below 50%.

 

[Percypig]

I just wanted to charge the battery a few times from almost empty to full.

 

[sjpt]

You have to remember that you only get around 75% of the power when your battery is empty compared with when it's full.

and if you have significant voltage sag, even less.
(like none if your battery was really empty)

 

[Az.]

I just wanted to charge the battery a few times from almost empty to full.

May I ask why?

 

[Percypig]

It has been suggested in few places that you should fully discharge and charge the battery a couple of times at the start for long term health.

Could be BS but I have always done it with phones, tablets, laptops etc. I will defer to a battery expert on the reasons why. Something to with calibration?

Like you my charge cycle is usually 50-100% after a couple of 20 mile rides.

 

[saneagle]

It has been suggested in few places that you should fully discharge and charge the battery a couple of times at the start for long term health.

Could be BS but I have always done it with phones, tablets, laptops etc. I will defer to a battery expert on the reasons why. Something to with calibration?

Like you my charge cycle is usually 50-100% after a couple of 20 mile rides.

Yes, it's BS left over from when we used to have ni-cads and nihms, which do need that procedure. Lithium is different.

 

[Percypig]

Should I get one of these to reduce drag whilst riding? Using this motor i am riding much faster. I seem to riding at about 20mph uphill, 30mph on the flat and upto 40mph downhill (on knobbly tires).

At these speeds drag is much more noticeable. I recon 50mph downhill would be achievable on the right descent with one of these bad boys.

 

[Woosh]

Yes, it's BS left over from when we used to have ni-cads and nihms, which do need that procedure. Lithium is different.

it's not BS. Sometimes, batteries become unbalanced as a result of dendrites forming after the batteries are left unused for months if not a whole year. When that happens, you'll see than your range is reduced more than 20% and the voltage at full lost about 0.5V-1V.
There is no easy way to rid the dendrites other than running a full discharging/charging cycle. If your BMS and cells are still good, no harm comes to them during this full cycle.

 

[saneagle]

it's not BS. Sometimes, batteries become unbalanced as a result of dendrites forming after the batteries are left unused for months if not a whole year. When that happens, you'll see than your range is reduced more than 20% and the voltage at full lost about 0.5V-1V.
There is no easy way to rid the dendrites other than running a full discharging/charging cycle. If your BMS and cells are still good, no harm comes to them during this full cycle.

How many times have you had to do that on your batteries? What sort of cells are in your batteries that get dendrites? I've never had to do it on any new battery I've ever bought.

 

[Woosh]

How many times have you had to do that on your batteries?

Once or twice. Andy is trying to resurrect an old battery earlier this week.
There are people who still use their 5+ years old batteries although we write to them and invite them to buy a new one.

What sort of cells are in your batteries that get dendrites? I've never had to do it on any new battery I've ever bought.

I don't know. I can ask him on Monday. Dendrites are not the only possible cause for cell imbalance. We also use the full cycle for checking the remaining capacity, an early indication if a battery is at risk.