aczlan
Good Morning
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- Kubota L3830GST, B7500HST, BX2660. Formerly: Case 480F LL, David Brown 880UE
IIRC the ones we have had were 3 year full replacement, then 2 years of prorated replacement.
Aaron Z
Can I charge multiple batteries at once?
- Thread starter al b
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Aaron Z
tallyho8
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- Aug 1, 2004
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- Kubota L4400, Kubota ZD326
They exchange them for free if they are under 3 years old. If they are over 3 they have a pro-rata exchange for a few more years.
Bedlam
Veteran Member
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Thanks allot. I didn't realize this. Good to know...I buy many and I guess Ive been lucky not to have to return any..
I tried to buys some tires today at all mart and no one seemed to know how to find the price, LOL at least for the Douglas,(economy brand)
I tried to buys some tires today at all mart and no one seemed to know how to find the price, LOL at least for the Douglas,(economy brand)
RalphVa
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- Dec 19, 2003
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- Charlottesville, VA, USA
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- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
Forgot to mention. My neighbor's old JD has 2 batteries in parallel. Think there are quite a few vehicles that utilize 2. When they were built, one battery didn't provide enough amperage, apparently.
Ralph
Ralph
schmism
Super Member
ive got a fleet of about 5 driveing vehicals. Needless to say they all dont get daily work so it might go a week or so between when i drive one for the sake of driveing it. And it usually has close to a dead battery. SO i keep a spair that i tote around to jump them with.
At the end of the day when im done, i pull the car up to the garage, hook both my booster battery and car battery up via jumper cables and attach the charger for a 12v 2amp overnight charge.
At the end of the day when im done, i pull the car up to the garage, hook both my booster battery and car battery up via jumper cables and attach the charger for a 12v 2amp overnight charge.
SPYDERLK
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- JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500
Charging system is fine. Just that one of the batteries didnt like cold weather and discharged the other thru it. The dealer replaced the pair after 1st sending us away saying the charging system was ok. So then they figured it out when the pair again went dead overnight when it got cold again a few days later.
Sounds like your set is a very good match. It can happen, but it would be better to have a built in switch in the // system to disconnect the batteries from one another when not in use.
larry
Mickey_Fx
Veteran Member
Just ran across this thread and thought I'd throw in my two cents worth.
In my working days as an eng for HP, I had an assignment studying lead acid batteries. Think I have a fairly good understanding of the care and feeding of them. Here are a few points.
* LA batteries are typ charged using a constant potential (voltage) charger.
* Charging constant potential, batteries are self regulating as to the charge rate. One can think of constant potential as being very similar to siphoning a liquid between multiple containers. The container with the higher liquid level will flow into the containers with the lower level. As levels get closer to equal the flow rate is reduced and stops with they are equal. Charging batteries, the container with the higher level is the charger and it will cause current flow in to the batteries until they are equal.
* What charge voltage? 2.2V to 2.4V per cell. The higher the voltage the shorter the charge period. For a nom 12V battery this translates to 13.2 to 14.2 volts. At 2.2 volts, one can leave the battery on the charger indefinitely. Smart, multi-stage charger typ drop voltage down to 13.2 for float charge.
* A nom 12 volt battery can rise in voltage during charge to ~13.8 - 13.9 without danger of over charging.
* batteries are a chemical factories and their activity varies with temperature. Low temps, low activity, both in self discharge and ability to deliver high current rates.
* LA batteries self-discharge is relatively low. At 70F their self discharge rate is about .01-.1%/day/remaining capacity. They can set for long periods with little discharge at low temps but when COLD they can't deliver high current rates. Don't confuse cold performance with being discharged, they are not the same.
* When charging multiple batteries at same time and charging parallel, battery capacity doesn't enter the picture, it is voltage that counts. If the batteries are in good condition, differences in capacity doesn't count. Charging serially, capacity does count since all the current flow, flows through ALL the batteries.
For the original question. It appear you are wanting to make sure the batteries are kept topped up. Multiple batteries on a single charger of about 6A capacity should be no problem. Automotive size batteries can accept ~2A for long period without damage. I would want to make sure the charger's voltage isn't too high when few batteries are on the charger.
I have a number of batteries in several tractors that sit all winter without being on a charger and come spring I don't have a problem firing up the equipment. If I had to start one of the tractors and it was real cold outside, I'd have some concern about batteries ability to supply the needed current but that wouldn't be because of partial discharge of battery. I would need to make sure there was NO current flow during winter storage. That includes making sure the top of the battery was clean and no conductive path present.
If you live in an area where it gets real cold, and had need to use the battery from time to time, I'd bring them inside so they don't get too cold to delivery the current you need for use.
In my working days as an eng for HP, I had an assignment studying lead acid batteries. Think I have a fairly good understanding of the care and feeding of them. Here are a few points.
* LA batteries are typ charged using a constant potential (voltage) charger.
* Charging constant potential, batteries are self regulating as to the charge rate. One can think of constant potential as being very similar to siphoning a liquid between multiple containers. The container with the higher liquid level will flow into the containers with the lower level. As levels get closer to equal the flow rate is reduced and stops with they are equal. Charging batteries, the container with the higher level is the charger and it will cause current flow in to the batteries until they are equal.
* What charge voltage? 2.2V to 2.4V per cell. The higher the voltage the shorter the charge period. For a nom 12V battery this translates to 13.2 to 14.2 volts. At 2.2 volts, one can leave the battery on the charger indefinitely. Smart, multi-stage charger typ drop voltage down to 13.2 for float charge.
* A nom 12 volt battery can rise in voltage during charge to ~13.8 - 13.9 without danger of over charging.
* batteries are a chemical factories and their activity varies with temperature. Low temps, low activity, both in self discharge and ability to deliver high current rates.
* LA batteries self-discharge is relatively low. At 70F their self discharge rate is about .01-.1%/day/remaining capacity. They can set for long periods with little discharge at low temps but when COLD they can't deliver high current rates. Don't confuse cold performance with being discharged, they are not the same.
* When charging multiple batteries at same time and charging parallel, battery capacity doesn't enter the picture, it is voltage that counts. If the batteries are in good condition, differences in capacity doesn't count. Charging serially, capacity does count since all the current flow, flows through ALL the batteries.
For the original question. It appear you are wanting to make sure the batteries are kept topped up. Multiple batteries on a single charger of about 6A capacity should be no problem. Automotive size batteries can accept ~2A for long period without damage. I would want to make sure the charger's voltage isn't too high when few batteries are on the charger.
I have a number of batteries in several tractors that sit all winter without being on a charger and come spring I don't have a problem firing up the equipment. If I had to start one of the tractors and it was real cold outside, I'd have some concern about batteries ability to supply the needed current but that wouldn't be because of partial discharge of battery. I would need to make sure there was NO current flow during winter storage. That includes making sure the top of the battery was clean and no conductive path present.
If you live in an area where it gets real cold, and had need to use the battery from time to time, I'd bring them inside so they don't get too cold to delivery the current you need for use.