Wisper battery

[winterdog]

just as comparison my light just moved to amber(just charged before i left) after this trip today 27km very little twisting though

 

[Vikki]

Me and my Wisper have done 2000 miles now and the battery still seems full of get up and go.

I tend to ignore the battery level indicator when I'm powering along because it's reading on-load battery terminal voltage which is no idicator of battery level really. When I'm stopped and the battery is off load I see that it goes straight up to green and will be green when I get to work after 7.5 miles. However, the last two days it's taken a while for the green to come on but there has been a foul northerly tearing down the Eastern Road. Even in derestrict and me helping the speed hovered around the 14mph mark (that's how strong the headwind was, normally headwinds I can cut through at about 16mph). Consequently, mucho juice was consummed by the motor to combat this. However, the green light does (eventually) come back on at rest.

On the way home, the lights do their thing and for a good portion of the return journey I will just have a green light at rest. By the time I get to the bottom of the Eastern Road it is not really there. This assuming a no wind on either leg of the Journey. Typically, I get headwind on the way home.

By the end of the journey (totalling 15 miles) I have a yellow light and no signs of flagging in the battery. In fact, I forgot to charge it one night (actually, it's worse than that, I plugged it all in but failed to turn the charger on). Bikey got me to work the next day without any problems power-wise. I took the charger with me and charged him up at work but I suspect he would have seen me back home.

Hope that gives some indication of how the battery stacks-up. By the way - I'm deristricted for 80% of my journey with full throttle and moderate pedalling keeping my speed at 17-18mph. Pedelec mode is set to 80%. Bikey does the bulk of the work, I kind of let him while I take it easy.

 

[eddieo]

I am carrying out tests on my battery this week.(rained off today) It is a 14 amp wisper 905SE as well. I am also 17 stone. so far 2 rides of 8 miles. de restricted all the time. I pedal all the time, and only use additional throttle on inclines. just had a look and all 3 lights on, but I suspect the green will go once I start peddling......as it was dim on my return yesterday

I expect to get at least one more circuit out of it (8 mile) maybe 2? who knows! It will be interesting to see what's left.....

so the general thoughts on here so far seems to be about a 30 miles range more or less? But I guess this would be for an average weight person......My wife on her 14 amp 705 sails up hills without hardly changing gear, while I am in low gear full throttle frantically trying to keep up........

Well.....did another 8 miles today (8x3 =24 ) the wind was against me but I stuck to my guns and did not use the throttle much. shortly after I left the green light failed and when I got home the amber is still on but there is a distinct lack of kick when you throttle on now......

So it looks as if the consensus of 30 miles? is about right

 

[Wisper Bikes]

Range

Hi Guys

Range so much depends on so many variables.

Use of the throttle is a big user of available power,

If the bikes it de-restricted this will reduce about 20 to 25% of the range.

Tyres need to be fully inflated.

The number of times you stop and start has a huge effect.

Wind speed and direction.

The weight of the rider.

The terrain.

Our Delmar is; Do we get rid of the throttle and the de-restrict so the range will be up in the 50's or do we leave them on for people to make their own decisions as to range against the kind of ride they require?

Our road tests always return 60 to 70 miles and often more from fully charged to a flat battery.

This reminds me a little of Jeremy Clarkson putting a gallon of fuel into a Ferrari driving it hard on a race track and running out just over a mile into the circuit, Ferrari say you will get 12 miles to the gallon! It so depends on what you are asking the vehicle, Wisper or Ferrari to do!

All the best David

 

[Wisper Bikes]

36 or 37?

Is this the serial number? (can be seen in attached photo)

260240A0-002
B/E 0015


Second photo shows label on side of battery. Curiously it says 36v when everything I read on the website says they are 37v

They are 36V batteries, the cells are 3.7V each and there are ten of them but I felt calling them 37V was confusing matters so everything is being changed to 36V now.

The max output is about 42V.

You will notice a drop in power as the battery discharges much like a tourch, if you want to get all the range out of the battery you have to run it till it dies.

Did you send this data to Norman?

All the best David

 

[Straylight]

Our Delmar is; Do we get rid of the throttle and the de-restrict so the range will be up in the 50's or do we leave them on for people to make their own decisions as to range against the kind of ride they require?

As these options were the deal closer for me, my vote is to leave the decisions with the customer (we are always right after all ). As for the range argument, I don't think you've mis-sold your machines by claiming they will do over 50 miles no matter what, your literature simply states that it's possible.

 

[Wisper Bikes]

Thanks

Hi Straylight

I agree, the Wisper is all about choice, hence we shy away from torque sensors. We believe the rider will be able to decide on the power he or she requires more efficiently than the bike and adjust accordingly with the throttle and the power choice!

All the best David

 

[tenderbehind]

Hi Kabadi, From what you say it would seem that your battery perhaps isn't up to par, though as we all know there are so many variables that affect range. I find that my Wisper 905se with it's 14amp 36v battery seems to do about 32 miles, this is made up of the green light going out after about 5 or 6 miles, (though I've never actually measured this distance). The speed and urgency drops of slightly at this point where now the amber and red light only are on. Then the amber light goes out perhaps after another 20 miles but there is still quite a bit of power and enthusiasm from the battery with red light only until the whole thing packs up at about 32 miles. I see what Monster means, I think the throttle is great, and I don't think I would have even bought an e bike without one, the novelty and assistance without one would not have appealed. Personally I only pedal when I start off from stationary and then bring in the throttle, this assists the battery, and I pedal on any kind of incline, shallow or steep, until the road flattens out.
I'll shortly post a topic re a recent holiday to Wales, very pleased with bike and battery.

 

[Wisper Bikes]

Battery

Hi Kabadi

I have checked your serial number and the battery was manufactured in May last year so you will not have any problems due to it's age.

Have you tried running it flat and recharging a couple of times, that always helps. If you are still having problems you will need to consider sending it to our service department.

All the best David

 

[eddieo]

Well.....did another 8 miles today (8x3 =24 ) the wind was against me but I stuck to my guns and did not use the throttle much. shortly after I left the green light failed and when I got home the amber is still on but there is a distinct lack of kick when you throttle on now......

So it looks as if the consensus of 30 miles? is about right

Did 6 miles today, the amber was more or less out near home but I could still make decent progress on throttle only if I wanted. In fact after a rest the amber is on again....... I would think it had another 5 miles in it maybe more!. So that is 8 x 3 + 6 + an estimated extra 5/10 till flat = 35/40

I think this is very good considering my weight My wife would probably get 45/50 out of hers.....will try it next without the de restrict on but I like the kick it gives! lol

Kabadi, seeing as we are around same weight, I think you need to try conditioning your battery first if that fails to improve things get it tested by Wisper

 

[Kabadi]

Thanks for all the responses and advice everyone.

I have bitten the bullet and am in the middle of a distance test where I am going to ride until it is completely flat (even if I have to cycle all on my own to get home)

I will post again with my results.

 

[Kabadi]

Well I got to 30 miles and it still had not run out completely. However it was becoming a bit gutless so I am now charging for next week.

It seems that I was putting too much emphasis on the indication lights when the motor was active. I don't think it is very clear. When I see a red light with the word empty next to it, I tend to think that perhaps it is getting empty!

Still I now know that I can get upto 30 miles so am happy.

Thanks to everyone for sharing their experience and advice.

 

[uk_steve]

Hi Kabadi

I have checked your serial number and the battery was manufactured in May last year so you will not have any problems due to it's age.

Have you tried running it flat and recharging a couple of times, that always helps. If you are still having problems you will need to consider sending it to our service department.

All the best David

i just been searching posts and this 1 is for me



just to pick up on your reply Dave

when battery is flat you charge it twice? because myself have a complete flat battery for the 1st time on the 8amp

i want to get the max effect charge now b4 i go back on it


i today went to my next town which is about 9miles return journey
i got back into my town but i was .75 mile away from my house when it run out of juice completly,
it felt like murder at the time but got home ok with 3 stops on a wall and bench to recharge steves power



look forward to your reply or anybody in the know

 

[Wisper Bikes]

Double Charging

During a visit to the charger factory last week I discovered the following.

If you have a completely flat 14A battery and a 3A charger it may be worth charging the battery until the charger turns off (4 hours 20 minutes) and then turning the power off, wait a minute, and then on again to run the battery through another complete charge cycle. If you have an older 2A charger this is certainly worth doing, it will reinvigorate the battery quite dramatically. We will be bringing some 4A chargers in early in 2010 and will offer a 33% discount to any Wisper owner who would like to purchase one.

If your 8A battery is still playing up we will have a look at it for you and swap it out.

All the best David

 

[eddieo]

During a visit to the charger factory last week I discovered the following.

If you have a completely flat 14A battery and a 3A charger it may be worth charging the battery until the charger turns off (4 hours 20 minutes) and then turning the power off, wait a minute, and then on again to run the battery through another complete charge cycle.

All the best David

When conditioning a new battery is it better to do this as well or just the once. I did not realise the charger cut out after 4 hours, I thought once the fan stopped it went into trickle charge

Its a bu$$er trying to discharge battery and get those last lights out while riding.

 

[uk_steve]

i now got my 14amp battery for my bike a week back

i have not been out on it yet, i let you know how i get on with the battery soon as i have had a few runs

i got a little computer for my journey time distance etc
so i can do a Steve log



all the best from Steve

 

[mapman]

i now got my 14amp battery for my bike a week back

i have not been out on it yet, i let you know how i get on with the battery soon as i have had a few runs

i got a little computer for my journey time distance etc
so i can do a Steve log



all the best from Steve

uk steve.

good luck with the new battery, look forward to some info on distance and mph you get.

thanks,

mapman.

 

[eddieo]

To Clarify, my old 905 has been sold and using my wife's brand new 705SE with 14 amp battery (same running gear as the 905) Just started the first discharge /charge cycle which I will repeat 3 times. i

The reason I resurrected this thread was because of David's last comment about double charging......and I wanted to know if this is a good idea with a new battery.

 

[Mussels]

During a visit to the charger factory last week I discovered the following.

If you have a completely flat 14A battery and a 3A charger it may be worth charging the battery until the charger turns off (4 hours 20 minutes) and then turning the power off, wait a minute, and then on again to run the battery through another complete charge cycle. If you have an older 2A charger this is certainly worth doing, it will reinvigorate the battery quite dramatically. We will be bringing some 4A chargers in early in 2010 and will offer a 33% discount to any Wisper owner who would like to purchase one.

If your 8A battery is still playing up we will have a look at it for you and swap it out.

All the best David

If I try and do this with an almost flat battery then the second time I switch on the charger it goes green after just a few seconds, doesn't that switch the charger off?

 

[uk_steve]

i now got my 14amp battery for my bike a week back

i have not been out on it yet, i let you know how i get on with the battery soon as i have had a few runs

i got a little computer for my journey time distance etc
so i can do a Steve log



all the best from Steve

Steves 1st run today via the 14amp battery

coast road on and off public highway flat terrain
i did a 7m round trip

i am pleased to say i can do 17miles an hr on the flat with pedal power and throttle with ease

with my weight and build thats amazing i think