Burgerman wrote:Use a phone GPS app. Its not really distance that eats batteries though. Its load. Turning, ramps, hills, road camber etc.
Heres an 88 mile GPS track from expresso in new york! With a sore bum.
Damn I cant find it.
And I think snaker in vietnam beat him.
LROBBINS wrote:AWG 16 is 1.3 mm^2
Burgerman wrote:Do you have an adjustable power supply?
Set to 14.4V and set 500mA (1/2 A) leave connected till current drops to practically nothing. Not more than say 12 hours. Then if looking good set to 13.6V and leave for a couple of days set to max of 250mA.
Burgerman wrote:Yes.
It spends time at this elevated voltage charging considerably faster than it does at float voltage. Thats why its use in cyclic operation or you would never get it done in 2 days.
But while at this voltage several things happen.
1. It creates oxygen and hydrogen, more at a high CV and less at a lower one. This is recombined back into water as long as current is low. But it produces some heat.
2. It causes excess positive plate corrosion...
So the perfect CV stage would be at the manufacturers mid CV voltage range corrected for temp. And it should end when on a typical chair sized battery current falls to 1000thC or a bit more if not super healthy so 500thC. Remember to include the chairs OFF current draw. Usually very low at under 15mA. In the event the battery wont drop this low after 8 hours @ CV stage it should terminate CV.
On a certain battery or type, and they do vary some, then charge should end and go to float when the battery current fails to fall by 0.1A over a 1 hour period.
Some batteries that are a little sulphated or that have never been charged "fully" (properly) can actually begin to rise again. If so stop.
If an AGM battery reaches 8 hours CV after a typical days use and or terminates at or close to 1000th to 500thC i actally is full. At this point the fastest cyclic charge proper charge has been achieved. If its nearly full anyway, then do a shorter CV and it will get to say 500thC faster anyway.
If you use one of the multitude of mobility chargers god only knows what it will do. I have many. They all baffle me. But one thing they never do is a full charge. They will turn off CV (which can seemingly be all kinds of unstable voltages) about 4 hours too soon. Probably because they are terrified of getting one that runs away, smells terrible and melts the casing. That can happen with batteries long past sell by date... And then they rely on a too high float level of 13.8V to finish the charge. It will, but that takes a long time.
thetascott wrote:Found this. Never bought from them... https://www.powerstream.com/xlr-cable.htm . Just need to cut off the ring terminals.
wes4dbt wrote:thetascott wrote:Found this. Never bought from them... https://www.powerstream.com/xlr-cable.htm . Just need to cut off the ring terminals.
Thanks very much, this seems to be exactly what I've been looking for. Don't know how you found it, I ran out of phrases to Google. lol
If you care about longevity use genuine Neutrik https://www.neutrik.co.uk/product/nc3mxx
Good for 16A max. So no burning or overheating melting socket (hello permobil!)
Hes another one on aliexpress that looks okish
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