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

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.

Rugged, durable, and automatic features to keep the battery fully charged and desulphated for years!

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!

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.

Best charger I’ve owned so far..! Great quality, large clamps, great LED features!

Worked great and easy to install

Another homerun from Deltran! I have been using Battery Tender brand float chargers for many years and have been very satisfied. Based on some of the reviews and questions posted, I’m not sure all folks have a complete understanding of the intended purpose of these chargers. This is not designed to be a primary charger that is used to recharge a dead battery. This is used to maintain a charge on a battery during times when a vehicle or piece of equipment will be idle. It can stay plugged in all of the time and will not over-charge the battery. I use this particular one on my utility trailer which has an on-board deep-cycle battery to power a winch as well as interior lighting. When the trailer is not in use, I rely on the Battery Tender to keep the battery at peak charge. Because the trailer is parked outside, I chose this unit which is moisture resistant. Folks often ask if it is waterproof—the short answer is “no.” It has an International Protection Marking of IP67 (6 = Dust tight and 7 = Protected against immersion up to 1 meter for 30 minutes) and while it is certainly resistant to the elements (mine has been outside for almost eighteen months now) it would not be advisable to leave it where it is constantly wet or submerged. The charger comes with a harness with typical alligator clamps for temporary hookup as well as a harness with ring terminals for permanent installation. The harness is especially handy if the battery is not easily accessible—once it is installed, it stays with the vehicle and you only need to plug the charger into the harness. I highly recommend these chargers.