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Reviews Categories | Emergency/Portable Power: generators, solar, wind, thermal, etc | Battery Tender Waterproof 800 Help

Reviews Summary for Battery Tender Waterproof 800
Battery Tender Waterproof 800 Reviews: 3 Average rating: 2.0/5 MSRP: $49.95
Description: This charger is no larger than a standard computer mouse yet packs 800 millamps of pure constant current charging power. Coupled with a brain (IC chip), the charger will constantly monitor, charge, and then maintain your battery --- even while totally submersed under water! Perfect for all outdoor types of ATV's, watercraft, motorcycles, boats, or anywhere water is a threat. International universal input voltage works anywhere in the world 100-240 AC Volts 50/60 Hz.

"Supersmart" Technology

Spark Proof

Short Circuit Protected

Reverse Polarity Protected


Weighs only 1 Pound

3 Year Warranty
Product is in production.
More info:
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KB3MRU Rating: 4/5 Jan 15, 2014 00:53 Send this review to a friend
Very reliable  Time owned: more than 12 months
I have one of these on a vehicle that isn't used much, and the charger works pretty well all Winter. I'm not on HF, but haven't experienced any RFI on VHF frequencies.

It seems to be encased in epoxy to make it very water proof.
AE5KA Rating: 2/5 Aug 6, 2010 10:15 Send this review to a friend
RFI problem  Time owned: more than 12 months
I just got off the phone with the Deltran engineer who designed this unit. He says that this particular model uses a switch mode power supply at a fairly high frequency, unlike the other products in the line like the Battery Tender Jr. which operate at 60 Hz. If you need to use a radio nearby, stay away from this unit.
N1KSN Rating: 0/5 Jul 10, 2006 10:20 Send this review to a friend
Terrible RFI  Time owned: 3 to 6 months
I had high hopes for this charger, given its compactness and resistance to water. However, I soon discovered that it puts out terrible RFI from MF to (at least) VHF. I installed chokes on the AC and DC lines, but with little effect.

I also came home one day to find that it was overcharging my wet lead acid trolling motor battery, with lots of gas discharge and some loss of electrolyte.

Just pray that your neighbors don't use this one, either.

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