NOTE: This Deltran Battery Tedder Plus is not a deep charge charger. For deep charging you need a different model. And this charger works only for six cell lead acid batteries. It cannot be used where it is exposed to rain or snow nor in excessive heat. I gave this battery charger-maintainer five stars because it works great and its made of strong metal not cheap plastic. A pair of red and blue LED's indicate what the charger is doing and problems with the battery being charged. The only limitation is that it can be used only with the included battery connection wires. For the price this charger is a winner.
You must use the included battery connector to connect the charger to the battery. The connection wires have an electronic control that provides safety and overload protection functions. Connecting directly to the battery with wires cause the charger to give the reverse polarity signal which is alternating blue and red flashing LED's.
My only complaint is that the user manual description of LED signals is confusing. Connection to the battery is simple but it takes a lot of time to read in tiny print what the different flashing or steady LED combinations mean. The company needs to provide a table that defines what the pair of LED's indicate.
Update: I did use this charger-maintainer on a large deep discharge battery that I use to run a sprayer pump. The battery was discharged 50% or more. It took overnight for the charger to fully recharge the battery which was a surprise because the user instruction say the the red charge light being on for a long period indicates there is a problem with the battery. I knew that this battery is OK so I let it continue charging. I knew that it was safe to do so because this charger has great safety protection.
| Manufacturer | Battery Tender |
|---|---|
| Brand | Battery Tender |
| Model | Battery Tender 021-0128 |
| Item Weight | 1.45 pounds |
| Product Dimensions | 4.87 x 3.25 x 2.93 inches |
| Item model number | 021-0128 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | 021-0128 |
| Safety Rating | Não Aplicável |
| Amperage | 1.25 Amps |
| Voltage | 12 Volts |
