Product Description

12V/800 milliamps charger is 100percenterproof; lightweight and compact Three-step constant current charge program with SuperSmart™ technology Spark-proof Short circuit and reverse-polarity protected Weighs just 1 lb. Photo`s are for reference only. Please read item title carefully.

Product Details

• Amazon Sales Rank: #50 in Automotive
• Color: Black
• Brand: Deltran
• Model: 022-0150-DL-WH
• Released on: 2006-12-01
• Dimensions: 10.00" h x 4.00" w x 10.00" l,

Features

• Spark proof for added safety
• Reverse polarity indicator for user safety
• Constant current charging and regulated voltage prevent overcharging
• Waterproof for all types of outdoor use
• 3-year warranty

Customer Reviews

Heavy-Duty Charger, but a little slow
Deltran Battery Tender 12-Volt 800 milliamp Waterproof Battery Charger

The Battery Tender Waterproof Tender operates in essentially 3 stages. It first initiates an absorption charge that attempts to charge your battery to 14.5 VDC at up to 0.8A (or 800mA). This bit of information was not readily advertised, so I was concerned when I heard my battery making gurgling noises while the LED was "amber" for the past 8 hours. This battery was only 2 years old with less than 5000 miles and had been maintained since day 1, so I was sure it wasn't a problem with the battery.

My previous charger, a Black & Decker / Vector 2A "smart" maintainer tried to keep my battery voltage at 14.75 VDC at 2A for over 24 hours. Needless to say, I was concerned when I saw this happening with a brand new Battery Tender. I dug around on their website and discovered a PDF that indicated the Tender would try to reach 14.5 VDC, at which point it would switch to a trickling charge and finally the maintenance charge. I logged all of the readings and confirmed that once the battery reached 14.4-14.5 VDC, it would start to trickle down finally remaining at 13.12 VDC @ 20mA. A modern car's parasitic draw is about 1-2 mA, so the 20mA maintenance charge is to compensate for the parasitic draw and for self-discharging of the battery. I discovered the Tender does a much better job at a maintenance charge because I have yet to see the Tender go into Amber mode, whereas my Vector/B&D occasionally switches back and forth even on a fully charged battery.

The Tender Waterproof is fully encapsulated with a thermally conductive potting material. This makes the unit quite heavy for such a small device. It uses a quick-disconnect 2-terminal fitting that is commonly used for battery chargers/maintainers. It comes with ring terminals or large battery clamps all fused with a 7.5A ATC fuse. I made my own wiring harness with smaller alligator clips since I don't have room under the hood for large clamps, and I do not want to permanently install a set of ring terminals that can short out or cause other problems in the long-run.

Pros: Battery Tender has an excellent reputation for making reliable chargers. The Waterproof unit is quite durable and is insulated from shock, water, corrosion, extreme temperatures and other environmental variables.

Cons: At 800mA max current capacity, this charger will work rather slowly for 50Ah or larger capacity batteries.

Overall: If you're using the charger in an environment subject to cold or hot temperature swings with plenty of moisture, I recommend the Waterproof unit over the Tender Jr or Tender Plus.

Best Deal For What It Does
I put these on all my vehicles that are in storage. I bought them on a recommendation of another car collector. His cars sit all year run only a few times and he's not had a dead battery in years. Fully automatic, just leave it plugged in without a worry! Waterproof so I have mine mounted on board in my wave runners.

Excellent
These are outside in the sun and rain all the time. Work flawlessly! Also keep my jet ski batteries charged so that all I have to do is get on and press start. No more jumping my battery.