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Thread: Suggestions on buying UPS batteries.

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    Default Suggestions on buying UPS batteries.

    As the title says, I need suggestions on buying a pair of Sealed Lead Rechargeable batteries, the UPS I have is a Spark Power 1200-U, with the following writen on the back: Power 1200VA/720W; I opened it up and found a pair of batteries that has the following specs on them: 6FM7.5 (12V7.5AH/20HR) and I have the following questions:

    1) What brand of batteries should I be looking forward to, maybe with a bit of higher spec while maintaining the original dimensions? My target is to safely turn off my PC and prevent data loss during a power out, and not long period of usage, so a max of 5 minutes during gaming or a 15~20 minutes backup while browsing wouldn't hurt, which will be used occasionally I suppose.

    2) Recommendation for a shop to buy the batteries from? An exact location of a shop you have personally dealt with before or a personal preference would be useful.

    Tagging three well regarded in-house experts: @minitt , @redwan hasan , @Swapnil . Of course, anyone who has any insights on the above queries can contribute for which I'll be looking forward to.

    Thank you for taking the time to read this.

  2. #2
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    You can put anything between 7.5AH to 9AH, if the size fits inside your UPS. Can't suggest particular shop right now, you can try anything from any Rahimafrooz dealer, or you can try Powertree 8.2AH batteries from superior electronics.

    From personal experience: though my powertree UPS died once and needed a circuit change, the batteries are still holding up pretty good even after two years.

  3. #3
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    Mine was bought in September, 2014. It served me well for a year, then the backup time became shorter, and before the batteries gave in, it had this problem of shutting the PC down all of a sudden after providing a few seconds of backup durimg a power out, but if I turned the UPS on manually after that, the batteries didn't seem to be empty at all and I could do a cold boot and have enough time left for a shut down. Now the batteries appear swollen, one of them is kinda leaky from visual inspections. Another question I have is how can I recycle these?

  4. #4
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    Quote Originally Posted by Fox Mulder View Post
    Mine was bought in September, 2014. It served me well for a year, then the backup time became shorter, and before the batteries gave in, it had this problem of shutting the PC down all of a sudden after providing a few seconds of backup durimg a power out, but if I turned the UPS on manually after that, the batteries didn't seem to be empty at all and I could do a cold boot and have enough time left for a shut down. Now the batteries appear swollen, one of them is kinda leaky from visual inspections. Another question I have is how can I recycle these?
    Swollen lead acid batterie? That's a first for me. UPS shutting down right after power cut is common for old/damaged batteries. You should replace them as soon as possible. And for recycling, again I cannot say any specifics, but I know for sure that that there are shops that recycle batteries in BD. Because I've seen crushed battery casings being exported at Chittagong port as ABS plastic scrap. I think you'd find answers in those shops where they sell tires and car batteries.

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    I found this in amazon, spec is as you said. Also Rahimafrooz is the current distributor of Lucas batteries. So give them a call and ask if this is available or not. Also you can go for 9AH too.

    https://www.amazon.co.uk/Lucas-Seale.../dp/B00LX90DGS
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  6. #6
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    U can actually use 9A sla batt as well as they have the same size. Ritar battery is sold by a distributor in gulshan nikunjo. U can google to find their address.

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    Anybody care to help me out too? I could use some replacement batteries for my PowerTree 1250VA, also the switch doesn't exactly work well too

    What's the most affordable I can get?

  8. #8
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    Quote Originally Posted by Trave160 View Post
    Anybody care to help me out too? I could use some replacement batteries for my PowerTree 1250VA, also the switch doesn't exactly work well too

    What's the most affordable I can get?
    if you need the absolute cheapest then go to noBa our, shundorbon market. There is 1 or 2 wholesale dealer who sells all kinds of sla battery. 7 7.5 8 or 9a all come in same size.

  9. #9
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    Quote Originally Posted by minitt View Post
    if you need the absolute cheapest then go to noBa our, shundorbon market. There is 1 or 2 wholesale dealer who sells all kinds of sla battery. 7 7.5 8 or 9a all come in same size.
    Thanks, can you give me an estimate for example of their prices?

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    1200 per piece for 8a. 1500 for 9a

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    Bought a pair of cheap ¤¤¤ Aptech batteries for 825/- each.

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    Quote Originally Posted by Fox Mulder View Post
    Bought a pair of cheap ¤¤¤ Aptech batteries for 825/- each.
    Good info. Now I can lower the budget for my 1kW LED flashlight project a little. Was it the cheapest one available?

  13. #13
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    I bought these batteries in a hurry due to time constraints, there might be even cheaper batteries available. I checked the backup time and it's good but I have this paranoid feeling that my UPS is charging constantly. Is there anyway to implement something like an indicator on these cheapo circuitry that'll indicate charging status, voltage and stuff?

  14. #14
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    Quote Originally Posted by Fox Mulder View Post
    I bought these batteries in a hurry due to time constraints, there might be even cheaper batteries available. I checked the backup time and it's good but I have this paranoid feeling that my UPS is charging constantly. Is there anyway to implement something like an indicator on these cheapo circuitry that'll indicate charging status, voltage and stuff?
    Lead-Acid batteries are in fact charged constantly. It's called the float charge and is done at a lower voltage than the bulk charge. The simplest way to check if your UPS is dropping the charging voltage to float levels is with a multi meter. If you want to monitor it continuously then you should find one of these.

    If you are concerned because the UPS is getting hot. Wait a few days. SLA batteries sometimes need a few cycles before their charging behavior becomes normal.

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