List Price: $32.95
Sale Price: $26.62
Today's Bonus: 19% Off
As advertised, well packed, fast shipment. Highly recommended!
I've read many comments on whether or not various batteries like this are really sealed, or really AGM, especially because they're shipped with the acid separate.
Yes, it's an AGM battery. That means Absorptive Glass Mat there is a finely-woven mat of fiberglass between each plate. You might be able to see it before you fill the battery. This allows thinner (and thus weaker) plates with less danger of breaking because the mat supports them and they lie together as a unit. This allows more plates in a smaller case, for more capacity. It's not new technology and not exotic, but it works. A side benefit is that these batteries don't have free acid sloshing around.
The battery is sealed AFTER you add the acid and put on the seal. The acid is shipped separately so the battery is as fresh as possible when you get it, with no concern about shelf life. The manufacturing date is really only relevant in case there was a run of bad batteries, so they can be identified. The day your battery is activated is its real "Born On" date (unlike beer...).
I have no connection with the seller or any battery company, I just see so much confusion in reading reviews and questions, that I wanted to try to clear this up.
Also the life of batteries like this is still limited by their state of charge. Batteries sulphate over time, particularly when discharged. These batteries often go into lawn mowers, toys, etc., with poor charging systems. If you want the battery to last longer, hook it up to a battery conditioner whenever it's not in use. NOT a cheap trickle charger, but a true battery conditioner that monitors the state of charge and only tops off the charge as necessary. The best ones also desulphate automatically, an electrical process whereby high-frequency pulses are sent into the battery both during charging and while resting. The conditioner monitors the state of sulphation and controls the desulphation automatically too.
Battery conditioners are not cheap and anything priced under $25 or so is probably NOT a computerized conditioner. You have to spend some money to get a good one, but buying a good conditioner now will probably make your battery last 3-4 times as long. Again, I have no connection to any battery conditioner manufacturers other than being a satisfied customer. I own seven of them, and every one is plugged in and working at the moment. Time to buy another one or two I guess. I won't recommend a brand (Amazon might not like that, though they do sell the ones I use), but my favorite has Minder in the name. I trust a $200 airplane battery to one of their aviation battery charger/conditioners, and have had EXCELLENT customer service from them. I but that brand because as far as I know every charger they make is als a computerized battery desulphator, not just a plain or computerized charger. I don't think their competitors are so deeply committed to good battery conditioning.
I don't know about the ones with Tender in the name never had one but the ones I looked at years ago were just trickle chargers. Never had one of the ones from tha automotive tool and paint company in Pennsylvania either, though I have lots of other stuff from them. And the cheap trickle chargers from the well-known Chinese tool store have a reputation for burning out batteries by overcharging, though I know people who use them too.
Good luck!
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