Thread: Lithium brands

Originally Posted by Kevin22

In series for 24v will not pull equally from each battery. As the lead acid gets low (below 12v) it will pull more amps from the lower voltage battery than it will the lithium, draining it even faster until eventually the lead acid is pulled down so low it gets damaged. You wont know there is an issue because the lithiums constant
13.1-13.3v will continue to produce 23v+ when the lead is toasted and the motor will continue to work somewhat well.

Never ever ever mix battery chemistry, from AAA up to deep cycles....

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Please enlighten us as to HOW the different amounts of current will be "pulled" from each battery. Hint - it doesn't. I mean are you saying that if you put an amp meter in series on the positive lead of each battery you will get different amperage readings? Won't happen in theory nor in reality.
Now if you were to let either battery draw down too far either could be damaged, but remember he is looking at it as a back up, in case something were to happen to one of his batteries. That's what he said. He's not using it daily and draining it down past it's ideal usability.

Of course it's not an ideal situation to "mix" battery types, but in this situation would be viable backup as @bricks suggests.

Originally Posted by MDCrappie

Please enlighten us as to HOW the different amounts of current will be "pulled" from each battery. Hint - it doesn't. I mean are you saying that if you put an amp meter in series on the positive lead of each battery you will get different amperage readings? Won't happen in theory nor in reality.
Now if you were to let either battery draw down too far either could be damaged, but remember he is looking at it as a back up, in case something were to happen to one of his batteries. That's what he said. He's not using it daily and draining it down past it's ideal usability.

Of course it's not an ideal situation to "mix" battery types, but in this situation would be viable backup as @bricks suggests.

You should talk to a lithium battery professional. You are incorrect. The amps are drawn dependant on voltage supplied, no two batteries in series ever draw equally unless the voltages are absolutely equal (like two lithium) otherwise the battery with the lowest voltage will have more amps drawn from it than the others. Its just typically they are so close when talking two lead acids that it wont be noticeable. But one battery at 13.3-13.1v and the other 12.4-10.9v is a huge difference and you will roast that lead acid battery.

Thats just how it works. Thats why you cant mix lead acid with AGM as well, same thing will happen.

You could definitely do it in an emergency situation, but be careful not to draw the LA too far down.

You can draw a lithium down as far as you want, so your comment of "drawing either one down too far will damage them" is completely incorrect. Ive had my Ionics draw down to 0% and too low for the BMS to even turn on when i accidentally left my trolling motor plugged in and on over winter. I jumped them using an old school charger to wake up the BMS and they both charged to 100% and say 100% healthy in all cells in the app.


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Originally Posted by Kevin22

You should talk to a lithium battery professional. You are incorrect. The amps are drawn dependant on voltage supplied, no two batteries in series ever draw equally unless the voltages are absolutely equal (like two lithium) otherwise the battery with the lowest voltage will have more amps drawn from it than the others. Its just typically they are so close when talking two lead acids that it wont be noticeable. But one battery at 13.3-13.1v and the other 12.4-10.9v is a huge difference and you will roast that lead acid battery.

Thats just how it works. Thats why you cant mix lead acid with AGM as well, same thing will happen.

You could definitely do it in an emergency situation, but be careful not to draw the LA too far down.

You can draw a lithium down as far as you want, so your comment of "drawing either one down too far will damage them" is completely incorrect. Ive had my Ionics draw down to 0% and too low for the BMS to even turn on when i accidentally left my trolling motor plugged in and on over winter. I jumped them using an old school charger to wake up the BMS and they both charged to 100% and say 100% healthy in all cells in the app.


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You've been listening to a battery salesman, not a battery professional. You're repeating what you have been told, not what you have learned. That's how discussions turn into arguments. But at least it looks like you now agree that it will work in the "to get by" situation mentioned by @Bricks. I guess you'll take back the "No you can't" comment you made to him? https://www.crappie.com/crappie/fish...s/#post4440524

I’ve watch a lot of YT videos of lithiums being tore down,and read a lot on other forums,looks like the BMS is the weak point on all of them. If or when I switch, it will be a Fourth of July,Black Friday sale or watch for deals in the threads of other forums, BBC had a thread (36 volt 60 amp hour for $290) a week ago.
Wally World group 31s lead acid arent a $100 anymore around here closer to $120 I see 100amp hour lithiums for $180 on sale,(my work boots cost more then that and they only last a year companies selling the same size lithium for 4-5 times the price with the same (China)components is legal robbery.lol. I,ll take my chances on warranty…

Hang on folks- the lithium prices are gonna start dropping like a rock soon!

Hang on folks- the lithium prices are gonna start dropping like a rock soon!

Can you expand on your statement or are the Chinese watching your every move.

Thanks

Originally Posted by Central Minn

I’ve watch a lot of YT videos of lithiums being tore down,and read a lot on other forums,looks like the BMS is the weak point on all of them. If or when I switch, it will be a Fourth of July,Black Friday sale or watch for deals in the threads of other forums, BBC had a thread (36 volt 60 amp hour for $290) a week ago.
Wally World group 31s lead acid arent a $100 anymore around here closer to $120 I see 100amp hour lithiums for $180 on sale,(my work boots cost more then that and they only last a year companies selling the same size lithium for 4-5 times the price with the same (China)components is legal robbery.lol. I,ll take my chances on warranty…

Here is video that covers the construction of lithium batteries. This guy is one of a few places that build batteries in the USA. I believe the outfit is called the Mad Scientist out of Flora Mississippi. He goes over what goes into building lithium batteries. I remember him saying condensation is the main reason batteries fail. He also mentioned a quality BMS is also important and does name the two he uses. He provides some good information. The cool thing is they repair batteries while you wait

The Baddest Lithium Batteries On The Market!!! - YouTube

A very good article using LA and lithium batteries in parallel

Lithium-Hybrid.