NPP 12V 2.9Ah Rechargeable AGM SLA Battery F1 Terminal (2Pcs), Small 12 Volt Backup Replacement for Fire Alarm, Security System, Emergency Light, DJW12-2.9 APC UPS BE425 Compatible

I say how sweet the sound because our blue tooth speaker battery died on us. Now we have sweet music again. Great battery YEAH!!!

I purchased this backup battery replacement for my APC UPS 350. In the description it clearly states that the battery will work with this backup unit. When I received the product, I descovered that the positive and negative terminals are switched from the the original battery and the cables are not long enough for the battery to be put into the compartment in the right orientation for the cover to be reinserted.I attempted to return the product, and the seller sent me a return label that requires me to pay for return shipment.This is an invalid product description and I am being asked to pay for returns for something that is incorrect in their product description?I called an Amazon representative, and they have sent an email to the seller letting them know I am requesting a prepaid return label. I have not yet heard back from the sellerBuyers beware. the product picture doesn't show the top of the battery so it isn't clear that the positive terminal is on the right hand side vs left.UPDATED 1/18/23 - After Amazon reached out to the seller, they did send me a prepaid return label for me to return the battery. I did make a jumper cable to allow the positive wire to reach the positive terminal, so I may be keeping the product, in any case, the seller did come through (although I do think I shouldn't have had to have Amazon intervene. I'm updating my review from 1 star to 3. The battery may work fine, but really not a valid product description.

I had to replace my battery packs, and used these. First, they worked well. I had ordered and paid for 60, I received 40. Contacted seller, he sent 10 more, contacted them again and they sent 10 more. These came packed in boxes of 20, with one label for both boxes on one box. So the carry may have failed to get all 3 boxes to me. IDK. I am sharing my experience. Place all 60 and the machine would not function. Had to call the technician (total cost for him to come out was $512) and found one of the batteries was bad, and would not hold a charge. Ordered 2 more, replaced the one and they worked perfect. 1 bad out of 60, is frustrating and expensive, but they do work well once installed.

Polarity was reversed for my install, but I just removed the 4 screws in the es350 and routed the wires to my needs (easy, no tools except a Phillips screwdriver). Make sure unit is unplugged before proceeding. Fit was perfect and works great! Seems to last a long time, using for internet backup (modem and router). Would recommend!

First of all, this product was exactly what I needed to update the batteries in our Hoyer lift. Unfortunately, just under a year after purchase, the batteries stopped holding much of a charge. I contacted the seller and they confirmed still under warranty and would send replacement batteries that same day! Would definitely buy from them again!

This worked perfectly for me. The reversed polarity was not an issue as my device (medical) had very long leads. If your leads are very short, it might be an issue. Height and width were right on (for a 2.9 amp 12v battery) the only tiny difference was it was about 1/16" or 2mm thinner. I just padded it a tiny bit so it can't rattle. Amazon asked for a rating for longevity (who knows). Amazon asked for a rating of Ease of install, that would be determined by the device it goes into! Works great and has a charge (no idea of level assume it is the ideal 50%)

The size it very small and easy to take with you

Works great for my H10PM leak detector. Fits perfect.