any opinions on a battery charger?

onesojourner

I use a thumb throttle.
Location
springfield, mo
I am in the market for a battery charger. price is my main concern and I would like to it to be good for the car as well as the ski. any thoughts on what I should be looking for?
 

DaUpJetSkier

I like square
Location
Marquette, MI
From battery tenders FAQ, Im a big fan of their products and I use their trickle charger for brand new batteries.

20. Can the Battery Tender Plus successfully perform the initial charge on a new, flooded, motorcycle battery?

Background: The motorcycle dealers receive batteries from the manufacturer in a dry state. The plates are dried out, and there is no acid in the cell compartments. (Do not confuse this with a dry-cell battery.) The dealer must fill the individual battery cells with acid and then put them on a shop charger to pre-charge prior to selling them to a customer. As the batteries arrive from the manufacturer, the plates are approximately 80% "formed". The initial pre-charge, post-formation charge, or more correctly, formation-finishing charge, must be conducted at a specific power level and for a specific time period. Each manufacturer has its own recommendations, for example one manufacturer recommends that the charger deliver a constant current equal to 10% to 15% of the battery amp-hour capacity and that the charge current be applied to the battery for a period of 5 to 10 hours.

Answer 1) Certainly if the dealer has properly pre-charged the battery after filling it with acid, then the answer is ABSOLUTELY YES.
Answer 2) If the dealer has not properly pre-charged th
e newly filled battery prior to the sale, then the answer is YES, WITH SOME QUALIFICATIONS:

Qualification A) The Battery Tender® Plus should be left on the new battery for a minimum of 24 hours on float, in addition to whatever amount of time it takes for the charger to get to the float stage. It is not clear how to correlate the 80% formed plates with a given state of charge once the cells are filled with acid. To be safe, assume that the batteries require a full 100% charge after the cells are filled.

For example, a 16 Ah battery will take about 13 hours to get to the absorption voltage (constant 14.4 Volts). It may take another 6 to 8 hours to reach the float voltage (constant 13.2 Volts). This may sound awkward; because what happens is that the battery charge current drops while the absorption voltage is held constant. When the battery current drops to 0.1 amp, or if 6 to hours have elapsed at the absorption voltage, the charger automatically switches its output from 14.4 V to 13.2 V. So it may take the better part of 20 hours to reach the float stage. Add another 24 hours to that and you are at 44 hours. Throw in another 4 hours for good measure and you get a nice round, even 48 hours, or 2 days.

Qualification B) Although there are probably several charging methods that will be equally effective, regardless of who manufactures the battery, in the interests of technical consistency, they will not officially sanction any initial charging method other than those published in their technical applications literature.
 

adet16v

No like winter
I got one at Wally world for like 16 bucks. I think black and decker makes it. It is specifically for the smaller batteries in quads, jet skis, motorcycles etc. so prob no good for a car battery. It has a 2amp and 1amp charge. Its kick ass for the price.
 

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
not knowing anything about the particular one mentioned...

chargers are for charging...tenders are for maintaining the charge on a fully charged battery


I realize this is an old post, but I feel the need to comment. :biggrin:
I am using my tender for regularly charging the batteries used on my total loss system.
In fact, the low current charges of the tender are much better for battery life than full sized chargers that put out more current.
 
Last edited:

vjhardcore

Ride It Like Ya Stole IT!
Location
Toronto, Canada
Battery Tender Jr. I have 3 - I use all the time. My "Origional OEM Harley" one originally cost $100. The other two $20 originally for my Waverunners. I used the supplied pig tail lead and hard wired my SJ and bike (it has an OEM monitor alarm that continually draws power) - after every ride I just plug them in. No more replacing dead batteries. A must have in my opinion.
 
Top Bottom