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

This product works perfectly. It kept the battery charged while the car was not being used on a regular basis. I would have no problem buying another one or recommending this product to someone else.

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.

Compact, works well and excellent to maintain classic car battery.

Great item, glad for 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.

I ordered this battery Tender 800 originally for my 1966 mustang that just sits in the garage. I had already had a battery completely die on me and couldnt be charged up again. So I bought this Tender. I bought this one based on the reviews. It had a lot of reviews and most were great.When I hooked it up, the light was amber came on. So I left it charging for a few hours and went to see if the battery got too hot and nope it was nice and cool. I left it overnight. In the morning the light was still amber. Man three days past and I was thinking this thing wont work since the light was still amber. I guess the battery was so bad that it took almost 5 days to charge and on the 5th day, I looked at it and the light was green! So I went to crack it up. It took a lot of cranking but it started once gas got through to the carb! This tender worked great. At first I thought it didnt work. So now I fully charged my battery and since the light was green I unplug it. Now I charge it up every month. Keep in mind before I charged it the engine wouldnt even turn. All I heard was a click.I also have a 2008 G37 and when I turn off my car the lights stay on for 30-45 seconds or so and it has hight power headlights and that eventually has been discharging my battery. I also sometimes spend y lunch in my car listening to music with the car off. So this discharged by battery so much that it kept my car from starting. I even took the battery out and took it to the auto parts store thinking I would need a new one but they just charged it up. Now I hook up my tender once a month to it and charge it up as well.This thing is so great, I cant believe you just connect it and then just plug it in and it does everything.I would love too see bigger clips or maybe a way you can connect these clips permanently to the battery that way I could just plug it in on both end and bam charging begins. There is probably a way, I am just not that savvy.I definitely recommend this product. Just dont expect to get you battery charged in a couple of hours. It will probably take overnight or a few days depending how bad your battery is.

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.

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!

Purchased this Battery Tender 800 so I could keep the battery charged in my Dodge Caravan. It has worked out to be a GREAT investment. I was able to use the ring terminal harness to attach permanently to the battery cable bolts; then ran the lead down and out through the front grill of the van. It has worked flawlessly, and I haven't had to worry about the van being 'dead' when I need it. I bought this 2 years ago and have been using it continually with absolutely no problems whatsoever, and I'm now also using it to keep the battery charged on my alternate vehicle. It is one of the best purchases I've ever made and it has saved me from having to replace at least 2 car batteries, certainly. And now I don't fret about it, so that's good, too! ALSO: I would like to add that this is intended as a battery MAINTAINER; and while it is not specifically for charging 'dead' batteries, it will do so, if you give it enough time. It takes 3 or 4 days to do it, but it will get the job done. I used it on my Dodge Neon's dead battery; car wouldn't turn over (just clicked) so instead of having to take the battery out of the car and put it on a faster charger, I just used the alligator clamps and my Battery Tender. It worked like a charm, took about 4 days to get it charged back up but since then it has been working just fine (and the battery in question is from 2010...). I have since installed a ring terminal harness and maintain this same battery with my Battery Tender 800.

Excelente y original perfecto para las motos yo lo ocupé para una Harley ultra

Broke almost immediately. Very bad quality.

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

Subito attaccato alla batteria della mia Harley e funziona benissimo , il prezzo non è eccessivo i materiali sono buoni, me lo aveva consigliato un amico e sono rimasto soddisfatto. Fa il suo lavoro egregiamente...ricordatevi di acquistare a parte un adattatore per prese americane perché non è compreso nel kit, mal di poco con pochi euro si trovano in tutti i negozi di elettronica o da un elettricista di fiducia. Consiglio vivamente l'acquisto a chi come me usa la moto solo nel periodo estivo.