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Sounds like time for a huge Garage Sale, Trouty old boy?Quote:
Personally I can't be bothered carrying one of these anymore and they have been delegated to a shelf in the shed with all the other things I have bought that I though were a Good idea at the time and have been disappointed at their usefulness and are slowly gathering dust.
I bought one a few years back in Ulladulla as a mates kids had left the ignition on in their people mover, I'd just acquired the Disco and you can't clutch start an auto.
I can't recall if I was in the Disco or the work ute at the time, but the jumper leads were in the Deefer back in Canberra and I didn't have the facility to jump from the second battery that I had in the Deefer.
Used it once since, worked as advertised.
Plug it in once a month
You can deep discharge as much as you like and it has no measurable effect on battery life, although if it's a multi-cell battery then you are reliant on the protection circuitry to cut off prior to cell damage. Pretty much all of them do. If you want to extend the life then you don't fully charge. 80% seems a good tradeoff of life vs capacity. A number of electronic devices have a battery preservation mode where you can limit the charge capacity in exchange for a longer life. My old 2006 Vaio was the first PC I had that did that as an option. I had 3 batteries in the life of the laptop and anecdotal evidence was it worked. I've heard some of the phones offer that option now also.Quote:
Originally Posted by DiscoMick
You could describe it as a Lithium battery has a life limit of supplying X number of Ampere hours. If you do that over 200 full cycles, or 2000 short cycles it's not really that much different, but they do tend to age faster if you charge them to capacity (resulting in fewer cycles).
If you want to store them, discharge them to ~40%. Put them in the fridge. Heat and a full charge are the enemy of Lithium cells, 40% seems to be the value where they age the slowest. Over discharge will kill them quicker plating the electrodes and potentially causing catastrophic failure when you try to recharge them. In this context, over-discharge is past the point the BMS would have already disconnected the cell, so it's not something you can do deliberately or accidentally. This is the reason they have protective circuits to prevent over-discharge.
You can leave them on the charger as long as you like. Chargers for Lithium batteries cut off when they are called "full". Trickle charging kills them.
Frankly without the protective BMS, Lithium batteries are spawn of the devil. The role of the BMS is to prevent them going off in your pocket and setting fire to your grundies.
The electronics have now evolved to the point where a lithium battery (one or more cells) is a robust, mostly safe and usefully dense power source. It does take the electronics to keep things in check though.
I would love it to be that simple for me. I have an intermittent battery drain that can disappear for months then come back without warning. I’ve tried to find the cause. I have had two auto electricians look into it with no luck. I have a solar blanket and can jump from the lithiums behind the rear seats if I had to, but the jump starter is the quickest and simplest solution. It hasn’t let me down yet.Quote:
Originally Posted by trout1105
Lithium jump starter bought from Aldi. Here's hoping to never having to use it; but if I do need to, I'll report back.
In the meantime, if I ever I get the urge to go for a 2-week bike ride without access to 240v power but in mobile reception range, I can keep multiple mobile phones charged!
Got a Noco GB70 to replace my cheaper jobbie that puffed the battery when I cranked my D1 a little long (No circuit doing any temp sensing etc).
The Noco has an impressive build including electrode jaws 3 times the size and thickness as the old one. Good kit.
Cheers
I bought a Projecta 1500 amp unit
It failed after a 300 tdi start
I have since gone to Repco capacitor starter and it’s been a much better thing