Announcement

Collapse
No announcement yet.

Which cheapy battery is more reliable under harsh conditions?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Which cheapy battery is more reliable under harsh conditions?

    Cheapest SLA or Cheapest LIFePO4?

    I bought 4 LiFePO4 12V 10AH for $37 each on Amazon for a home build . Had to return one that was only 3 volts and wouldn't charge. Then I installed all 4 and it goes to empty as soon as I accelerate. I'm beginning to think these cheap LiFePO4 batteries are crap, so I'm going to return them? Is there a cheap battery that will work with a 48V system? I've been using the $30 SLA's on Cleveland, Ohio roads since 2020 with no problems, but I only ride maybe 5 times per month. I don't know much about this stuff so any help is appreciated.
    Click image for larger version

Name:	Screenshot 2023-03-17 at 22-57-33 Shop DEESPAEK 12V 10Ah LiFePO4 Battery Rechargeable Deep Cycle Lithium Batteries wit TrueGether.png
Views:	352
Size:	226.1 KB
ID:	161053 Click image for larger version

Name:	Screenshot 2023-03-17 at 23-11-07 Mighty Max Battery Sealed Lead Acid Battery 12 V 10 AH F2 Terminal SLA AGM Chemistry ML10-121532018 Zoro.png
Views:	261
Size:	94.7 KB
ID:	161054
    Click image for larger version

Name:	IMG_E4681.jpg
Views:	253
Size:	170.8 KB
ID:	161055



    #2
    What is your choice of 12V or 48V LiFePO4's that can withstand the constant bouncing on an Ebike and being stored in a cold and moist garage in spring/fall, with winters getting down to 0F ?

    Comment


      #3
      SST Quote ""after 22 years. I hit the jackpot on that battery. The factory forgot to add the aging compound to that battery.""
      Maybe SST forgot to add a dot (.) )between the 2`s.
      Is that 2.2 years or 22 years. Curious about Aging Compound.??

      Comment


        #4
        Your hub motor draws likely more then the batteries BMS can deliver.

        "Lithium batteries have a current (Amp) limit where their BMS board will shut down the battery's output power to protect the battery from overheating when too much current is being demanded from it. For example if a lithium battery has a maximum continuous discharge current of 30 Amps and a speed controller demands 31 Amps from it for more than a few seconds then the lithium battery's BMS board will shut the battery down."


        yours is a 10AH couldent find it but the 6ah is only 10 amp BMS (battery management system)

        Wiring in series only increases voltage not amps

        Its hard to beat the system with cheap batteries !

        DEESPAEK LiFePO4 Battery 12V 6Ah Lithium Batteries with 10A BMS, Rechargeable Deep Cycle, Perfect for Ride on Toys, Home

        What is a Battery Management System (BMS)? – How it Works




        Comment


          #5
          This physics video tutorial provides a basic introduction into ohm's law. It explains how to use ohm's law to calculate the voltage across a battery, the cu...



          If you want to learn this stuff

          Comment


            #6
            Looks like you built a cool bike big hub and rear shock.

            Buy one of these blue cube batteries





            Read the reviews their not all fake.

            I use a cheap blue cube battery from amazon it works well.

            I am not sure your batteries BMS the problem but I think so.

            Comment


            • Circuitsmith
              Circuitsmith commented
              Editing a comment
              Those blue cube batteries are not LiFePO4, are not as safe, and are not what the OP asked about.

              (I'm not "the above user" FWIW)
              Last edited by Circuitsmith; 03-28-2023, 02:58 PM.

            • paxtana
              paxtana commented
              Editing a comment
              The above user has been permanently banned for toxicity despite repeated warnings ranging from pushing politics in an explicitly non-political forum, to being hostile and disrespectful to others.

            #7
            Originally posted by stts
            Opps, I guess my memory isn't as good as it used to be. My battery is only 18 years old. Oh well, I suspect it's still out of warranty, hah. Yup, and its still got plenty of power to run my winch for the heavy stuff I do at home. This battery has never been removed from my winch lift since I bought it new in 2005. I thought it was 2001, but I guess not that far back. :) They didn't scratch off the label but they melted the date into the side.


            Thats cool!

            I left out lead the OP question cause the bike computer set to run lithuim ion.

            Comment


              #8
              Battery University™ is a free educational website offering hands-on battery information.

              Comment


                #9
                • I worship this guy.. You never answered the question (Post 3,1) What is an Aging Compound..???
                • SST Quote ""after 22 years. I hit the jackpot on that battery. The factory forgot to add the aging compound to that battery."" Curious about Aging Compound.??​ comment
                  • stts
                    #4.1
                    stts commented
                    1 week ago
                    Yup, I know what you mean. I am a monster Reaganite and Super-Loyal Trumpster.. They were two of the wisest men that ever walked the planet. And he did so much to make America so great again And we should never forget the things they taught us. Among his greatest lessons, Trust, but Verify. I worship those guys . Pics coming shortly, and he shouldn`t of bragged about committing adultry with Stormy.

                Comment


                • dirtman
                  dirtman commented
                  Editing a comment
                  I typed & edit`d the above post yesterday, But only as a joke and never hit the post button.
                  But today I see he`s no longer likes us. The restore button works perfect... Maybe he`s mad at me. I sometimes PM him when he makes comments about Donald *****. I try not to bring Politics into this forum but maybe we both have a political mental-disorder.

                #10
                Originally posted by CH300 View Post
                Cheapest SLA or Cheapest LIFePO4?

                I bought 4 LiFePO4 12V 10AH for $37 each on Amazon for a home build . Had to return one that was only 3 volts and wouldn't charge. Then I installed all 4 and it goes to empty as soon as I accelerate. I'm beginning to think these cheap LiFePO4 batteries are crap, so I'm going to return them? Is there a cheap battery that will work with a 48V system? I've been using the $30 SLA's on Cleveland, Ohio roads since 2020 with no problems, but I only ride maybe 5 times per month. I don't know much about this stuff so any help is appreciated.
                Click image for larger version

Name:	Screenshot 2023-03-17 at 22-57-33 Shop DEESPAEK 12V 10Ah LiFePO4 Battery Rechargeable Deep Cycle Lithium Batteries wit TrueGether.png
Views:	352
Size:	226.1 KB
ID:	161053 Click image for larger version

Name:	Screenshot 2023-03-17 at 23-11-07 Mighty Max Battery Sealed Lead Acid Battery 12 V 10 AH F2 Terminal SLA AGM Chemistry ML10-121532018 Zoro.png
Views:	261
Size:	94.7 KB
ID:	161054
                Click image for larger version

Name:	IMG_E4681.jpg
Views:	253
Size:	170.8 KB
ID:	161055

                This type of small LiFePO4 accessory battery isn't designed to give high amps, not even short bursts. You have these 4 in series as a 48V battery. It's only total 10Ah and propably max continuous amp rating is something like 8-10A, max burst maybe ~15A. If you try to output 1000-1500W(20-30A) it would just not work, the motor will not perform as it should and you will destroy the batteries in no time. This battery doesn't have a internal BMS that would protect it.

                A 10-12Ah lawnmover/motorcycle LiFePO4 start battery would provide totally different amount of burst amps, but propably not enough continuous amps either.

                Comment

                Working...
                X