Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation

Great product. Works perfectly. Happy with this purchase.

I ordered this Battery Tender 800 waterproof charger a couple weeks ago and had installed it onto the battery of my mustang that sits for quite a while between starts and drives. Since the battery was at full charge it litterally took a very short time to go into storage mode and do what it was designed to do. Previous to this item I had the Battery Tender Jr that had failed after approx 6 months BUT, in Deltrons defense, I was using it between my jetski and my mustang. I knew it wasnt designed for outdoor use, especially here in the humidity of southwest Florida ( I did have the forementioned items under a carport and the item covered by the jetski seat or mustangs hood). I never blamed the Deltron company and never left a poor review as I was more to blame for using the wrong device for outside storing. I do also own the Battery Tender Plus and have used it inside my storage shed on my RV battery for about 1.5 years now with no problems at all. Though I have not given the BT800 enough time to write a thorough review I realize that thier prodects are above average for the price and wanted to share my overall experience in general with thier products. I can safely assume the BT800 will surpass its expectations as it was desinged as an outdoor product. My mustang does sit under a carport and the BT800 sits under a closed hood where it will never actually get rained on, come in direct sunlight, chemicals, or any type of water outside of humidity. So since its designed for this and even harsher conditions I feel assured it will give me years of practical use. I will come back periodically to update this review as time goes on. I would recommend any of the Deltron products to anyone who plans to use them in the way they were designed! ***update 2/1/15*** Unit still works perfectly under the stangs hood, keeps the battery charged perfectly so its ready to go when I decide to start or drive it. I still highly recommend this product for anyone needing to maintain a battery that is outdoors!

Works fantastic to keep my lawnmower battery charged. It’s weather proof which I want for an outdoor storage space. This is my second one and it works great.

Excellent charger for the money. Comes with 2 ways to hook up to yor battery, alligator clips, and sae plug. My motorcycle already had the plug installed on it from the previous owner so I guess I have a spare. Weather resistance is a plus as my bike stays under a cover parked under my carport, but when there's gusty winds and rain it does blow in, so being weather resistant helps. Once you install your choice of hook up, it's just a matter of plug and play. Very easy. Remeber to set for lead acid ir lipo battery, another usefull feature as I plan on upgrading to a lithium battery in the near future so I don't need to buy another tender/charger. Indicator lights let you know what type of battery is selected, and when the charger is charging. It's made very well and pretty heavy for it's size so I expect it to last for years to come. Also comes with screws so you can mount it to a table or wall. Very happy with my purchase.

I have 3 battery tender Jr.'s. They work very well, this one works but for the extra price of it being waterproof it does seem to be a little bit lacking in a couple of features. So it's water proof, meaning they should know it is being used outdoors where electrical outlets can be hard to find, and on non conventional equipment A little longer lead from the battery to the tender would have been nice. I see that you can buy an extension for this but why should I, they know what the intended use for the product is and seem to know that the cable is too short otherwise why sell a longer one? Also my tender Jr.'s have three lights to show stages of charge, why only two on this model? It starts out sort of amber but that can be confused easily with a green light when viewed in sunlight, then green. I do prefer the red upon initial plug in, then amber and then green when fully charged. It sounds a little picky but I liked the way my others work and got used to them. Why change a product that worked fine? Bottom line is it works as intended.

This is a battery MAINTAINER, not a charger. It will charge smaller batteries, and given several days, bigger batteries. Excellent for seldom driven vehicles or machinery, especially mowers, boat cranking and trolling batteries. Modern vehicles have so much 'stuff' with 'parasite' electrical drains, making this a crucial tool if a car sits much longer than a week or so. Main Point No.1 - This is WEATHERPROOF!!!!! Most similar devices are NOT. Handy for those without garages. Note that the terminal clamps convert to 'eyes' for a more permanent install and the cord can be routed out the grill leaving a short length sticking out with a 'plug-in' connection. However the supplied battery end cord is only 18" long and I need to get a longer one (I think I saw these on Amazon). Thus, one does not need to raise the hood every time you hook-up the maintainer. Main Point No.2 - This unit has a brain. It will charge until the battery reaches a pre-set upper limit, the shut off until the battery self-discharges to a pre-set lower limit. Main Point No.3 - The unit will not charge if a battery is really drained, which is my only negative comment. So, have your 'Yard-Sale and Flea Market' folks buy every old-school charger they find and use them to 'trick' the modern chargers into functioning.

Works extremely well with no issues. Read how to set type of battery. You need to do this whenever you hook device to new battery. Don't have to do this if it is installed or left on a battery.

Great battery charger. Doesn't work super fast as it is just a battery trickle charger/maintainer, but it does not have any issue charging and keeping charged my 12 volt deep cycle marine trolling motor battery. Comes with clamps that you can use to attach to the battery terminals, or little eyelet terminal leads that you can screw onto the battery terminals. They are interchangeable with the in line connector, and make it very easy to switch out or remove the battery. Simple indicator light lets you know when charging, yellow, and when it's maintaining/done charging, green. Incidentally, I also used this to maintain power to my car when I installed a new battery. Some makes/models can get a little fussy when the battery is disconnected and the car loses power. This can result in needing it to get reset at the dealer. However when you maintain some current, for example with a maintainer like this one, you can avoid those problems. I have been using this product for about 3 years, and would recommend it to anyone.

Broke almost immediately. Very bad quality.

This is an excellent trickle charger for my motorbike. Love it.

Very good quality, lasted very long with me (around five years) and I use it almost daily. very easy to use.

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