This is a continuation of discussion of getting the most out of an existing nimh battery:
Hi from Sydney
My Vectrix is approaching 3 years and is past 11,000 km. My battery pack is causing problems with reduced range. I pretty much only use it for my commute (<20km round trip). For the past couple of months I've been coping by charging every night. (I have the old system - my Vectrix doesn't have it's own timer but I connect it to a timer and charge for a few hours in the night.) The last couple of days I'm now getting the red battery light after about 6 or 7 km. When the light comes on almost all the bars on the battery gauge are still showing and the bike still seems to run OK. I'm worried the red light means I my Vecrtix may not keep running for much longer?
I know very little about batteries but after reading posts on this forum, I guess I must have a bad cell or cells.
The idea of conversion to a newer battery system is appealing. The costs you mention in your posts are not out of the question for me. I am very interested. I will keep an eye on the discussion.
its not so much the distance or age that causes problems, rather how often the cells are pushed to their limits (my own nimh pack was 13'450km before conversion with no issues, but had new firmware from the beginning)
out of curiosity, why were you not charging everyday?.
Most of my trips are short. By charging every two or three nights I rarely got down to less than 3 bars on the battery indicator. I was under the impression that it was good to occasionally run the batteries lower so every couple of months I would ride until the speed started to be limited. I pretty much never saw the red warning light and I thought I was taking reasonable care of the battery. Was it a mistake to only charge for 2 or three hours at a time? (Other threads on this forum mention equalisation can take longer.)does the red battery light stay on?
if it only comes on during acceleration, than the situation is not quite as dire as you may believe.
A bad cell or two will mean very short range, and poor acceleration.
if you are still able to make the 20km round trip, the batteries end of service life may be a bit further off yet.
The red light comes on and stays on. I think there is reduced acceleration on hills but the bike still rides OK in the 50 kph areas. On my trip home in the evening the same thing happens. The red light comes on towards the end of the 8 km trip. So even though I have not recharged during the day, I still get about 6 or 7 km before the warning light.
If my problem is simply a bad cell or two, how do I go about diagnosing this and replacing the cell? I don't want to electrocute myself! Is there anyone in Sydney I could pay to do this for me?
Thanks for the info.