SOHC.co.uk Forums > CB750
Battery resurrection
Mag1:
--- Quote from: El__burro on January 17, 2017, 10:23:07 PM ---
--- Quote ---yes there should be caps on to make it sealed, did it explode with gases when being charged? Wow if it did luckily it was not on the bike
--- End quote ---
Actually they just popped, no Hollywood style explosion.
The battery was on the bike.
I guess the regulator overcharged it until it dried out.
Shall I seal the holes before charging it?
Thanks
el__burro
No never plug holes while charging via battery charger, it will explode. Unless it's a controlled unit like a trickle charger which slowly charges, reaches it alternate max, then just charges in small controlled cycles to keep in top tune. I have an Oxford altermate and has been great, just plug in and leave and it manages itself. If that's what you have then or similar use that to recover your battery's. Usually battery chargers just charge until it boils, then your battery is no good and worse explodes. Happy biking
--- End quote ---
royhall:
Tried to resurrect batteries with various chargers and optimisers over the years and they never ever lasted more than a few days. Sorry it sounds brutal but yours has been cooked, throw it away.
Sent from my Nexus 6 using Tapatalk
K2-K6:
It looks from your readings as if two cells art completely stuffed, that 8volt after charging is the giveaway.
It's very unlikely you'll get that back to anything like normal.
Be very careful charging in a non vented area. if you spark it while connecting or disconnecting it after or during charging it will explode.
I think you got your regulator sorted before on another post? So it should be ok to use a new battery without risk to it now.
royhall:
I recently had a pair of Oxford 601 optimisers that cooked both lead acid batteries they were connected to. Had to bin both batteries, so I binned the optimisers with them. I use a pair of Noko Genius units now, and so far so good.
Greebo:
I have a Motobatt sealed battery on mine cost around £47.00 from Dave Silver,it as great cranking power.
[ Note they are not on his website ring them to order as it has to be the right one size wise etc to fit in the battery box]
regarding trickle chargers I use the Halfords one around £24 this one only gives out 1.25amps, this output is for most bike batteries to prevent damage, it has a on-off cycle, it stops charging when the battery is fully charged & then when the charge drops it kicks in again.
I have been using 2 of these Halfords charges on my CB750 & Thruxton for 3 years with no issues at all, & the Thruxton is still on the stock battery, both bikes are only run occasionally in summer months.
I don't leave the chargers on constantly through the winter storage period although you can if you want, i tend to keep the chargers on for a month & then turn them off for a week & whilst the charger is off I start the bikes up to warm them up a tad.
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