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I have a UPS backup device to protect my workstation DELL T1700 in my home office. the battery needs to be replaced. its brand is: DURA12-7F2 AGM. its technical spec is: 12V 7Ah. for this kind of battery, there are lot of options in Walmart store.
But, I noticed there is "AGM" on current battery. not sure what it is and here are my research:
1)Maintenance free AGM technology.
2)AGM stands for Advanced Glass Mat Technology.
So this battery is a little different than universal battery USB 1270 battery, but not sure the exact difference.
Curious to check our community here to solicit some insights on this battery.
diligent hands rule....
modified 26-Aug-21 20:58pm.
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That glass mat is just the separator between the two lead poles.
Sealed Lead Acid Batteries comes in two variants.
Absorbed Glass Mat, or AGM.
Gel batteries. Gel batteries are much less sensitive to vibration and shock and can be used in any position. AGM still prefer to stand upright, even if it isn't strictly necessary.
You probably won't need a gel battery.
Otherwise you only need to check that the specifications are the same (voltage, polarity, connectors and measures) or exceed the original (charge and discharge current)
There might also be some additives (calcium, strontium and whatnot) to the battery that add to its life, but I wouldn't care about it. That usually only matter if you deep discharge the batteries, or use them in high power applications such as starter batteries.
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Jörgen Andersson wrote: Sealed Lead Acid Batteries comes in two variants.
You're forgetting the third and most common form of lead acid battery, the flooded lead acid battery.
The difficult we do right away...
...the impossible takes slightly longer.
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But that's usually not sealed is it?
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If that is the same as the item from CSB with the same part number: CSB GP-6120F1 6V 12Ah Battery[^] then it is probably AGM (see the spec sheet for the CSB item).
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Flooded, are, by definition, NOT sealed. There are maintenance ports on them to allow checking the condition of the "water" and to allow you to top it up.
You cannot operate a flooded lead acid battery in any position than its access port facing upwards.
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Richard Andrew x64 wrote: You're forgetting the third and most common form of lead acid battery, the flooded lead acid battery.
Flooded lead acid batteries must NOT be used in office UPC-backups. During last part of charging they vent oxygen and hydrogen in a perfect explosive ratio. That is why one has to periodically add water - to replace the water that was decomposed. They can only be used in a ventilated compartment.
Sealed lead acid batteries do not vent explosive gasses, and are OK for indoor use.
FG Fletcher
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I did something wrong: I always lay the battery down, not upright always
Thanks for your info...
diligent hands rule....
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No worries, they are sealed anyway.
You might get slightly lower capacity if they lie down the wrong direction.
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What does this terminal mean?
Terminals: F2
Per your advice, I will put it upright always from now on...
diligent hands rule....
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It's the flat connector on top of the battery.
F2 is 1/4" wide, while F1 is 3/16" wide.
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Addendum:
Most UPS units have the F2 1/4" connectors and most off-the-shelf replacement batteries have 3/16" connectors - why? Go figure!
You can get adapters, but if you squeeze the UPS connectors a little bit with pliers they will be a sufficient fit on the new battery if it has F1 connectors.
2nd Addendum:
While I usually try to find Yuasa or Panasonic batteries which have (mostly) the best performance, you will probably get similar cost performance from cheaper off-brand batteries - you just have to change them more often.
So old that I did my first coding in octal via switches on a DEC PDP 8
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Actually, AGM are perfectly fine on their side. There is no liquid rolling around in an AGM. That is only in flooded cell batteries.
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This kind of thread is one of the reasons I love Code Project. There are so many finicky technical considerations for just about ANY kind of device and there always seems to be at least one or two experts who will respond to questions here. There are lots of other sites where you can get similar information but this one tops them all, IMHO.
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Assuming you have one, take the battery here and let them deal with matching.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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From my experience, you can replace the battery with any 1270, 1280, 1290 battery with the quarter inch F2 terminals.
For an APC UPS, you have to tell the ups that it has a new battery by resetting the date stored in the UPS -- otherwise it acts like the fresh battery is dead.
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Our in-house language translation group was "de-featured" (laid off), so when we needed language translations for our new product's UI updated we went with an outside company. It's been a very long time since I've dealt with an outside company. I screwed up and didn't submit a purchase requisition in advance, and just had them go ahead and do the work. They finished satisfactorily, and submitted an invoice that was less than their original estimate. All well and good so far.
Oh boy  did I screw the pooch.
At last count there have been over 20 emails between me, my boss, Purchasing, Accounts Payable, and the contact at the translation company, all in the last 5 hours. I'm going to be really pissed if we screw up the relationship with these folks, because they did a great job, quickly, and didn't create any kind of fuss over the format of the text to be translated that I gave them.
There have been a number of times in the past when I've gone to our local computer gear store or Best Buy and bought stuff on my own dime in order to get the job done. I can't do that this time, since $16K is a bit much to put on my MasterCard.
Software Zen: delete this;
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what kind of languages does your UI need to translate?
diligent hands rule....
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The current product shows the UI in English, French, Italian, German, Spanish, Japanese, Chinese Simplified, and Korean. The previous generation also had Polish and Russian.
Software Zen: delete this;
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Gary R. Wheeler wrote: English
UI
Gary R. Wheeler wrote: French
le UI
Gary R. Wheeler wrote: Italian
UI 🤏
Gary R. Wheeler wrote: German
GEBRAUCHERSINTERFACE!!! 
Gary R. Wheeler wrote: Spanish
la UI
Gary R. Wheeler wrote: Japanese
unclear, you want it in kanji (��), katakana (��) or hiragana (��)?
Gary R. Wheeler wrote: Chinese Simplified
��
Gary R. Wheeler wrote: Korean
��
I'll add in Dutch as a bonus: UI
Please send address for $16K invoice 
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Don't you mean interface utilisateur, interfaccia utente, Benutzeroberfläche, interfaz de usuario, ユーザーインターフェース, 用户界面, or 사용자 인터페이스?
Software Zen: delete this;
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That's literally what I said 
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Gary R. Wheeler wrote: At last count there have been over 20 emails between me, my boss, Purchasing, Accounts Payable, and the contact at the translation company, all in the last 5 hours.
All of which probably comes close to the 16K of the invoice.
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Close. We've certainly spent several hundred $ so far.
Software Zen: delete this;
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