Topic: Portable rechargeable battery solution help sought

[adamz]

I have this Intertek 9900993 battery that doesnt hold charge anymore. It is used for a portable scoring machine used to display scores and a timer at outside sporting events for kids. The school has four of them and all the batteries are essentially toast.
I can't find replacements, the supplier wants vulgar money, etc. I was going to chop off the 5 pin plug end and wire it up to a USB plug for the new batts we all love. The output on the spent one says 13.5V 2.2 A but the outputs on my USB externals all are 5V 2.1A. I know there's V and A tutorials but I have never sorted it out.
I seek a battery builder who is interested in this job. Pics of the existing batt are attached. I'd want 4 of them total. Some kind of newer style batt with no memory floor like the old NiCads had so they can be used a little bit and plugged back in to get charged.
Thanks!
Adam Z

[jefflester]

That is not a battery, it is an AC-DC adapter. The battery would be in the machine itself so you need photos of that and where that 5-pin plugs in. Have to get into the guts of the machine to replace the battery there. Can you power the scoring machine up when it's plugged into AC?

[adamz]

Thank you for that info! I'll take it all apart on Monday and see what's in there. I'll post back..
AZ

[grawk]

Thank you for that info! I'll take it all apart on Monday and see what's in there. I'll post back..
AZ

You’re going to take apart a power supply to find out why it doesn’t hold a charge when it’s not a battery? 

[adamz]

Here’s a pic of the batt. It’s lead acid.
I’ll get online tomorrow and do some research. I figured I’d post a pic of the batt so you know I didn’t dismantle the adapter.
Thanks again
AZ

[Scooter123]

I can’t say for sure but it sure looks like a standard motorcycle battery. Also used for alarm systems and driveway gates. 

[todd e]

I can’t say for sure but it sure looks like a standard motorcycle battery. Also used for alarm systems and driveway gates.

we used 12v SLA like that to run our apogees and ad2k's....

[jefflester]

What are the physical dimensions? It does look like a standard 12V/7AH SLA (sealed lead acid). Googling turns up dozens of choices $20-$30 range. They sell one at Home Depot, but my local doesn't have it in store, only ship-to or mail order.

https://www.homedepot.com/p/MIGHTY-MAX-BATTERY-12-Volt-7-Ah-Sealed-Lead-Acid-SLA-Rechargeable-Battery-ML7-12/307979135

https://www.amazon.com/12v-7ah-battery/s?k=12v+7ah+battery

Looks to be exact Leoch replacement:
https://batteryplex.com/product/djw12-7-012v7-0ah-leoch-battery/

[adamz]

Thanks a lot. The batt I have is 5.9" X 3.75" x 2.5".
I'll get the amazon one Jeff found (thanks!) and then the batteryplex one if it doesnt fit.
AZ

[adamz]

Thanks for the feedback and help, finished pics:

[adamz]

Pics

[adamz]

I'm back with another battery question. Ive upgraded 7 of the scoreboard units with the 12V SLA.
Does anyone know if I can substitute a newer style battery like the long lasting UsB lithiums we use now?
Here's the batteries I've been using:
https://www.amazon.com/ExpertPower-EXP1270-Rechargeable-Lead-Battery/dp/B003S1RQ2S?dib=eyJ2IjoiMSJ9.GMZo7SWdsoQQNirkzXHKjL-DFyHZER0P8hOHYDUoTRhl_MJAt2PafwnPLqTvPulVHFFBf0teUK24RUEiR0WtjBwIaot0E7wjzsBTP398s_pBJ6HwfKYJJWNu00SMvXHhRB0X_6-1HBkMjiIT1cp3leq6tyot_9Ii79ZgvOrqywZXAxwyk4c9UPyH8QCm0k3KlW1tsfXavup56xGO5rOPp3IrSjTmsgcrpLqJRlOpGHWBCgpMOAfQO22Y_52b8q8SAdEM36QJbXAO9ZJAD0XPnGqB-REWEq3_Givls4cX4ZU.txXE4G5O0JZ_8ulRkvmeh5dFRjbitgVwkPYNjpTN24c&dib_tag=se&keywords=12v%2B7ah%2Bbattery&qid=1726573203&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1
Can I just get any 12V 2amp output battery? I'd need to wire it to a regular red/black two wire so I'd be asking about that next...
Thanks in advance, here's a link to my latest tape:
https://archive.org/details/cornell-saxophone-quartet-may-1-2025

Adam Z

[rocksuitcase]

I'm back with another battery question. Ive upgraded 7 of the scoreboard units with the 12V SLA.
Does anyone know if I can substitute a newer style battery like the long lasting UsB lithiums we use now?
Here's the batteries I've been using:
https://www.amazon.com/ExpertPower-EXP1270-Rechargeable-Lead-Battery/dp/B003S1RQ2S?dib=eyJ2IjoiMSJ9.GMZo7SWdsoQQNirkzXHKjL-DFyHZER0P8hOHYDUoTRhl_MJAt2PafwnPLqTvPulVHFFBf0teUK24RUEiR0WtjBwIaot0E7wjzsBTP398s_pBJ6HwfKYJJWNu00SMvXHhRB0X_6-1HBkMjiIT1cp3leq6tyot_9Ii79ZgvOrqywZXAxwyk4c9UPyH8QCm0k3KlW1tsfXavup56xGO5rOPp3IrSjTmsgcrpLqJRlOpGHWBCgpMOAfQO22Y_52b8q8SAdEM36QJbXAO9ZJAD0XPnGqB-REWEq3_Givls4cX4ZU.txXE4G5O0JZ_8ulRkvmeh5dFRjbitgVwkPYNjpTN24c&dib_tag=se&keywords=12v%2B7ah%2Bbattery&qid=1726573203&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1
Can I just get any 12V 2amp output battery? I'd need to wire it to a regular red/black two wire so I'd be asking about that next...
Thanks in advance, here's a link to my latest tape:
https://archive.org/details/cornell-saxophone-quartet-may-1-2025

Adam Z

I am jamming this sax recording at work. THANKS!

[Gutbucket]

Can I just get any 12V 2amp output battery? I'd need to wire it to a regular red/black two wire so I'd be asking about that next...

Yes, that will most likely operate the scoreboard just fine.  Other than wiring it in correctly (red wire +, black wire -), the thing I'd be concerned about is how the battery is charged/maintained.  If there is some sort of charger built into the scoreboard it may not be compatible with batteries that use a chemistry other than SLA (sealed lead-acid).  But If using the appropriate external charger, no worry.

[adamz]

Thanks Gutbucket, there is an integrated charger. I won’t mess with it. I’ll keep doing what works.