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  #11  
Old 08-02-2018, 07:11 AM
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Brantel Brantel is offline
 
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Quote:
Originally Posted by bacstabber View Post
Because Iím electrically dependent on my aircraft with my alternative engine installation, I need to ensure that both my batteries are always charged. Therefore, I invested in a BatteryMinder charger, specifically for the odyssey batteries, that is capable of charging more than one battery at a time.

http://www.batteryminders.com/batter...er-desulfator/

I installed two cigarette lighter outlets on the belly of my aircraft near the battery. This is very convenient for plugging the charger into the aircraft. But it has an added bonus. When Iím camping, I can plug my portable electronic devices into the aircraft outlets for charging. Here is my builder log photos of the installation.

http://www.mykitlog.com/users/displa...=148109&row=15
Can you explain more about the "more than one battery at a time" with this charger?
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  #12  
Old 08-02-2018, 10:53 AM
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Quote:
Originally Posted by Sam Buchanan View Post
Take to heart the advice to not use a trickle charger with the PC-680. Regardless of whatever chemistry is in play, there is solid field history of AGM batteries dying early due to trickle charging. Fly the plane regularly, leave the charger in the toolbox and you should get excellent service for many years.
I agree with Sam in that unless you know the detailed specifics around how the trickle charger works with an AGM battery, best to not use one continuously.

The AGM batteries need a specific charge profile to last. Many of the chargers don't meet this profile. Even the chargers that were being sold by Odyssey at one time do not meet the profile and will kill the battery in a very short time if not used properly.
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Brantel (Brian Chesteen),
Check out my RV-10 builder's BLOG
RV-10, #41942, N?????, Working on Emp/Tail Cone
---------------------------------------------------------------------
RV-7/TU, #72823, N159SB
Lyc. O-360 carbed, HARTZELL BA CS Prop, Dual P-MAGs, Dual Garmin G3X Touch
Track N159SB (KK4LIF)
Like EAA Chapter 1494 on Facebook
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  #13  
Old 08-02-2018, 11:46 AM
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SmilingJack SmilingJack is offline
 
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I’ve had a Battery Minder since first flight and have plugged my airplane into it after every flight (except when away from home).

8 years flying and about 2 months ago I installed my 3rd battery - Concord.

So it appears I am getting about 3.5 - 4 years out of my batteries.

I change my battery out when I don’t like how the “Start” goes, if I feel the prop isn’t spinning quick enough when I hit the button, I change it out. I just don’t want to deal with a weak or dead battery away from home.

My charger is approved by Concorde and AGM batteries.

Like another post, I have a hole and a grommet in my rear baggage shelf for quick and easy access.
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  #14  
Old 08-02-2018, 12:14 PM
smithflys23 smithflys23 is offline
 
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It sounds like the general consensus is not to use a BatteryMinder. What do you use to recharge if your battery is run down from working on electrical issues?
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  #15  
Old 08-02-2018, 12:17 PM
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Carl Froehlich Carl Froehlich is offline
 
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Each of my planes have two PC-625 batteries in them, and I never use any kind of battery minder.

I replace one battery every three years (so no battery is more than six years old). Not because of a problem, just cheap insurance to make sure I have my design reserve battery capacity for my glass panels.

One of these pulled six year old batteries has been in the law tractor for the last three years. It sits all winter long and starts up the tractor in the spring like it was run the day before.

My point, battery minders are not required or desired when using Odyssey batteries.

Carl
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  #16  
Old 08-02-2018, 12:35 PM
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Quote:
Originally Posted by smithflys23 View Post
It sounds like the general consensus is not to use a BatteryMinder. What do you use to recharge if your battery is run down from working on electrical issues?
I think you are slightly off the mark, the unit is fine for recharging a run down battery, the problem seems to be when leaving it on for long periods to "maintain" the battery.
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  #17  
Old 08-02-2018, 12:38 PM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by SmilingJack View Post
I’ve had a Battery Minder since first flight and have plugged my airplane into it after every flight (except when away from home).

8 years flying and about 2 months ago I installed my 3rd battery - Concord.

So it appears I am getting about 3.5 - 4 years out of my batteries.

I change my battery out when I don’t like how the “Start” goes, if I feel the prop isn’t spinning quick enough when I hit the button, I change it out. I just don’t want to deal with a weak or dead battery away from home.

My charger is approved by Concorde and AGM batteries.

Like another post, I have a hole and a grommet in my rear baggage shelf for quick and easy access.
I wonder how much longer your batteries would have lasted without the constant trickle charging.

It isn't unusual for a regularly flown but non-trickle charged AGM battery to last 6-8 years.
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  #18  
Old 08-02-2018, 02:07 PM
smithflys23 smithflys23 is offline
 
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Quote:
Originally Posted by Mike S View Post
I think you are slightly off the mark, the unit is fine for recharging a run down battery, the problem seems to be when leaving it on for long periods to "maintain" the battery.
O.K, that sounds fair. In your opinion, Is the BatteryMinder the best choice for a rundown battery, or should I look for something different?
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  #19  
Old 08-02-2018, 02:24 PM
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Carl Froehlich Carl Froehlich is offline
 
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Quote:
Originally Posted by smithflys23 View Post
O.K, that sounds fair. In your opinion, Is the BatteryMinder the best choice for a rundown battery, or should I look for something different?
Go back and read my post (#2 on this thread) on rules on charging. What charger makes little difference (within reason).

For an abused battery (e.g. left the master on and it is flat) the best choice is replacement. Itís reserve capacity is now an unknown quantity - so should not be in an airplane that has dependency on electrical power.

For extended panel running, bite the bullet and get a real power supply like this: https://www.dxengineering.com/search...rder=Ascending

You can use this for battery charging while you are running the panel as well - just set the output voltage between 13.8 and 14.2vdc - whatever your alternator puts out for your battery.

Carl
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  #20  
Old 08-02-2018, 02:36 PM
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SmilingJack SmilingJack is offline
 
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Quote:
Originally Posted by Sam Buchanan View Post
I wonder how much longer your batteries would have lasted without the constant trickle charging.

It isn't unusual for a regularly flown but non-trickle charged AGM battery to last 6-8 years.
Thats what Iím thinking now. But I wanted to get my data out on this tread since I know how consistent I have been using the battery minder.

When I lived in NY I thought it was a good idea in the winter cold.

Maybe change is in order....
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