battery discharge

Is it me or is there some kind of weird fasination with having a battery on charge 24/7,my bikes been in the garage since october,theres no electric there so i just go start her up once a week and all is well,today i fired her up and went for a 30mile ride and put her away again.Im thinking alot of these batteries are getting cooked hence maybe why they are fcuking up?:Motomartin
 
Cookie is right. We used huge banks of lead-acid wet cells on the old diesel electric submarines, they were either floating on a charge(no pun intended), or discharging to provide power for propulsion and auxiliary systems. thats a LOT of amps. The batteries were installed for years (although they were extremely well cared for) and went through a lot of repeated heavy charge-discharge cycles.

The same is true for a lot of UPS systems and conversion machinery which have huge banks of wet cells on a constant floating charge. They don't die through the constant charging process.
 
Motorhomers and boat owners (I am an 'ex' both of these) do a lot of fretting about lead acid batteries and there's a lot written about battery management in these fields, but they are simple to use and manage if you are kind to them.

The killer for a lead acid battery is not charging it - leaving them in a discharged state for any length of time causes them to sulphate, as does heavy discharging (regardless of the type of lead acid battery - 'deep discharge' batteries are mostly snake oil - they just have heavier plates to cope with the heating in heavy use). Multi stage chargers are good for taking care of your battery, but don't believe the 'de-sulphating' rubbish they all talk about - commonly regarded as snake oil. It's also harder to fully charge a gel battery fully, but some of their advantages outweigh this disadvantage.

The two golden rules for maintaining a healthy lead acid battery are:

Use the right charge rate (i.e. the correct rate for the type of battery - very different for wet cell and AGM / gel batteries - a decent multi stage charger should take care of this)

Don't use more than 50% of it's rated capacity i.e. for a 19Ah battery, don't use more than 9Ah of juice (I guess this was the case in subs Pukmeister?). This is the killer on a bike, because we don't have the space to store a big enough battery. Hence we nearly always end up torturing our batteries through over discharging through multiple staring loads and a shed load of electrical accessories. This is why they end up a consumable item on a bike.
 


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