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#1
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Using a trickle charger - any rules on this?
So here's the deal. The car is a Honda Civic with a group 51 battery
(Kirkland Signature from Costco if that helps). Every once in a while the battery is heavily drained because a light (map light or headlamp) was left on. I do find it annoying that there is no headlight-on warning chime or auto-off. Sometimes it starts and sometimes it needs a jump; a portable jump starter always does the trick. The car itself is driven maybe a few times a month for short distances along with the occasional long trip. So I got a simple Schumacher Electric 1 amp, 12 V trickle charger - the kind with thin wires and light-duty clamps coming out of a wall- wart. It's labeled as a "manual charger" and the box/directions state that it's suitable for charging motorcycle and other small batteries, or for keeping auto batteries warm. I wasn't sure if I could justify getting anything more expensive like a higher output charger or maybe even a float charger/maintainer with a charge sensing mechanism. So I'm wondering how safe this is with a group 51 battery, which is on the small side for auto batteries? I realize that it's not likely to fully charge up a depleted battery unless it's on for days at a time. How safe is a 1 amp charge if uncontrolled like a float charger? I've heard some concerns that it could potentially overcharge - that maybe . 25 amp is about the limit for safe trickle charging. I've heard other comments that it's effectively a trickle charge that could safely be left on a fully charged car battery for days if not indefinitely. |
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#2
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Using a trickle charger - any rules on this?
y_p_w wrote:
> So here's the deal. The car is a Honda Civic with a group 51 battery > (Kirkland Signature from Costco if that helps). Every once in a while > the battery is heavily drained because a light (map light or headlamp) > was left on. I do find it annoying that there is no headlight-on > warning chime or auto-off. Sometimes it starts and sometimes it needs > a jump; a portable jump starter always does the trick. The car itself > is driven maybe a few times a month for short distances along with the > occasional long trip. > > So I got a simple Schumacher Electric 1 amp, 12 V trickle charger - > the kind with thin wires and light-duty clamps coming out of a wall- > wart. It's labeled as a "manual charger" and the box/directions state > that it's suitable for charging motorcycle and other small batteries, > or for keeping auto batteries warm. I wasn't sure if I could justify > getting anything more expensive like a higher output charger or maybe > even a float charger/maintainer with a charge sensing mechanism. > > So I'm wondering how safe this is with a group 51 battery, which is on > the small side for auto batteries? I realize that it's not likely to > fully charge up a depleted battery unless it's on for days at a time. > How safe is a 1 amp charge if uncontrolled like a float charger? I've > heard some concerns that it could potentially overcharge - that maybe . > 25 amp is about the limit for safe trickle charging. I've heard other > comments that it's effectively a trickle charge that could safely be > left on a fully charged car battery for days if not indefinitely. A manual charger that size won't do much. However if that battery has been drawn down that many times it is on borrowed time. I would replace the battery, then fix the warning chime. Unless that car was made before about 84-85 it has a lights on warning chime. The other option is to install a battery buddy. They monitor the draw on the battery and cut the power before it gets to low to fail starting the vehicle. -- Steve W. |
#3
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Using a trickle charger - any rules on this?
A 1 amp charger can be left on for a couple days and in fact a very slow
charge is the best way to revive a completely discharged battery. Contrary to what many people believe, completely discharging a lead acid battery doesn't do much harm. Mostly, the damage is done when recharging it. I think you are looking at something like 3 days to charge a fully discharged battery with 1 amp. -jim y_p_w wrote: > > So here's the deal. The car is a Honda Civic with a group 51 battery > (Kirkland Signature from Costco if that helps). Every once in a while > the battery is heavily drained because a light (map light or headlamp) > was left on. I do find it annoying that there is no headlight-on > warning chime or auto-off. Sometimes it starts and sometimes it needs > a jump; a portable jump starter always does the trick. The car itself > is driven maybe a few times a month for short distances along with the > occasional long trip. > > So I got a simple Schumacher Electric 1 amp, 12 V trickle charger - > the kind with thin wires and light-duty clamps coming out of a wall- > wart. It's labeled as a "manual charger" and the box/directions state > that it's suitable for charging motorcycle and other small batteries, > or for keeping auto batteries warm. I wasn't sure if I could justify > getting anything more expensive like a higher output charger or maybe > even a float charger/maintainer with a charge sensing mechanism. > > So I'm wondering how safe this is with a group 51 battery, which is on > the small side for auto batteries? I realize that it's not likely to > fully charge up a depleted battery unless it's on for days at a time. > How safe is a 1 amp charge if uncontrolled like a float charger? I've > heard some concerns that it could potentially overcharge - that maybe . > 25 amp is about the limit for safe trickle charging. I've heard other > comments that it's effectively a trickle charge that could safely be > left on a fully charged car battery for days if not indefinitely. |
#4
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Using a trickle charger - any rules on this?
On Jun 24, 1:32*pm, jim <"sjedgingN0Sp"@m@mwt,net> wrote:
> A 1 amp charger can be left on for a couple days and in fact a very slow > charge is the best way to revive a completely discharged battery. > Contrary to what many people believe, completely discharging a lead acid > battery doesn't do much harm. Mostly, *the damage is done when > recharging it. I think you are looking at something like 3 days to > charge a fully discharged battery with 1 amp. When I use a portable jump starter I typically leave it on for a minute or so before disconnecting it. It should definitely charge up the jump starter's battery a bit, and I understand that it might also reduce the initial charging current to the car's battery. I've been told by some people that a lower initial charging current is critical to reduce battery capacity loss. |
#5
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Using a trickle charger - any rules on this?
On Jun 24, 11:22*am, "Steve W." > wrote:
> A manual charger that size won't do much. However if that battery has > been drawn down that many times it is on borrowed time. I would replace > the battery, then fix the warning chime. Unless that car was made before > about 84-85 it has a lights on warning chime. My 2004 Subaru Impreza WRX doesn't have a headlamp warning chime, but it does have a headlamp auto-off feature. Same goes for some relatives' Toyota Camry. I did some research and I think I know what the problem is. Apparently the driver's side door open switch can get stuck to the closed position. I've noticed that the dome light doesn't turn on when the driver's side door is open and it's switched to the center (door selected) position. Apparently the headlamp-on warning or key- in-ignition warning chimes don't activate until the driver's side door is sensed open. http://vtec.net/forums/one-message?m...&page_number=1 |
#6
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Using a trickle charger - any rules on this?
On Jun 24, 1:54*pm, y_p_w > wrote:
> On Jun 24, 11:22*am, "Steve W." > wrote: > > > A manual charger that size won't do much. However if that battery has > > been drawn down that many times it is on borrowed time. I would replace > > the battery, then fix the warning chime. Unless that car was made before > > about 84-85 it has a lights on warning chime. > > My 2004 Subaru Impreza WRX doesn't have a headlamp warning chime, but > it does have a headlamp auto-off feature. *Same goes for some > relatives' Toyota Camry. > > I did some research and I think I know what the problem is. > Apparently the driver's side door open switch can get stuck to the > closed position. *I've noticed that the dome light doesn't turn on > when the driver's side door is open and it's switched to the center > (door selected) position. *Apparently the headlamp-on warning or key- > in-ignition warning chimes don't activate until the driver's side door > is sensed open. > > http://vtec.net/forums/one-message?m...&page_number=1 As a follow-up, I got home and checked it for this little switch. The first thing I noticed was that all three other doors worked fine with the dome light. Next, the little switch felt loose. I first tried prying it back (bending it) when I then noticed that there was a little hatch that opened to reveal the screw. The little switch was actually not connected to the rubber/metal switch cover. I think it was supposed to be grounded to the body via the screw, but the ground clips on the switch were always loose (might have even been shaking around in there never depressed). So now when the driver's side door is open and the headlights are on, it gives off a loud whine. Of course it doesn't do anything when the map lights are on. :-( |
#7
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Using a trickle charger - any rules on this?
"y_p_w" > wrote in message
... > So here's the deal. The car is a Honda Civic with a group 51 battery > (Kirkland Signature from Costco if that helps). Every once in a while > the battery is heavily drained because a light (map light or headlamp) > was left on. I do find it annoying that there is no headlight-on > warning chime or auto-off. Sometimes it starts and sometimes it needs > a jump; a portable jump starter always does the trick. The car itself > is driven maybe a few times a month for short distances along with the > occasional long trip. > > So I got a simple Schumacher Electric 1 amp, 12 V trickle charger - > the kind with thin wires and light-duty clamps coming out of a wall- > wart. It's labeled as a "manual charger" and the box/directions state > that it's suitable for charging motorcycle and other small batteries, > or for keeping auto batteries warm. I wasn't sure if I could justify > getting anything more expensive like a higher output charger or maybe > even a float charger/maintainer with a charge sensing mechanism. > > So I'm wondering how safe this is with a group 51 battery, which is on > the small side for auto batteries? I realize that it's not likely to > fully charge up a depleted battery unless it's on for days at a time. > How safe is a 1 amp charge if uncontrolled like a float charger? I've > heard some concerns that it could potentially overcharge - that maybe . > 25 amp is about the limit for safe trickle charging. I've heard other > comments that it's effectively a trickle charge that could safely be > left on a fully charged car battery for days if not indefinitely. Tell your wife or teenager that the next time they leave the car light on and the battery drains, they will need to pay for a tow truck to come out for a jump... End of problem, no trickle charger needed... |
#8
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Using a trickle charger - any rules on this?
"y_p_w" > wrote in message news:33f33c40-0b42-4ed5-a909- I've heard other > comments that it's effectively a trickle charge that could safely be > left on a fully charged car battery for days if not indefinitely. IIRC, batteries were damaged in the old days right in the showroom because of trickle chargers in the range of 1 -1.5 amps. They might be left on charge for months ( thus making the dry charge battery a step forward). You have at least two or three options: (1) Make sure all the lights and systems are off ( which sounds like it does not work for you and your present situation) (2) Buy a unit which will sense your battery condition, and disconnect it from the car's electrical system if the battery is discharged to a low level. (Google for them. They exist) (3) Use the trickle charger as a matter of course. I dont like to leave a battery a long time with 1 amp or more of charge, so I sometimes put a 12 v lamp in series with the leads and decrease the charge rate to a (bias level) 100-250 ma. Dead simple, and works fine. Wattage of the lamp determines the resistance, so you can select values to limit your charge. |
#9
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Using a trickle charger - any rules on this?
On Jun 25, 2:16*am, "Elmo P. Shagnasty" >
wrote: > In article >, > *"Steve W." > wrote: > > > I would replace > > the battery, then fix the warning chime. Unless that car was made before > > about 84-85 it has a lights on warning chime. > > Not Honda, no sir. *They leave that for the HIGH END models. *His Civic? * > Doesn't have one. Turns out it did, and the advice that it should be fixed was sound. It's a really loud continuous whine too. There would be no mistaking that. |
#10
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Using a trickle charger - any rules on this?
On Jun 25, 6:11*am, "William Munny" > wrote:
> "y_p_w" > wrote in message > > ... > > > > > > > So here's the deal. *The car is a Honda Civic with a group 51 battery > > (Kirkland Signature from Costco if that helps). *Every once in a while > > the battery is heavily drained because a light (map light or headlamp) > > was left on. *I do find it annoying that there is no headlight-on > > warning chime or auto-off. *Sometimes it starts and sometimes it needs > > a jump; a portable jump starter always does the trick. *The car itself > > is driven maybe a few times a month for short distances along with the > > occasional long trip. > > > So I got a simple Schumacher Electric 1 amp, 12 V trickle charger - > > the kind with thin wires and light-duty clamps coming out of a wall- > > wart. *It's labeled as a "manual charger" and the box/directions state > > that it's suitable for charging motorcycle and other small batteries, > > or for keeping auto batteries warm. *I wasn't sure if I could justify > > getting anything more expensive like a higher output charger or maybe > > even a float charger/maintainer with a charge sensing mechanism. > > > So I'm wondering how safe this is with a group 51 battery, which is on > > the small side for auto batteries? *I realize that it's not likely to > > fully charge up a depleted battery unless it's on for days at a time. > > How safe is a 1 amp charge if uncontrolled like a float charger? *I've > > heard some concerns that it could potentially overcharge - that maybe . > > 25 amp is about the limit for safe trickle charging. *I've heard other > > comments that it's effectively a trickle charge that could safely be > > left on a fully charged car battery for days if not indefinitely. > > Tell your wife or teenager that the next time they leave the car light on > and the battery drains, they will need to pay for a tow truck to come out > for a jump... Well - the deal is that I'd end up paying for it, and occasionally I'm the guilty party from turning on the lights during the day (typically for visibility in forest roads). The map lights however are usually not my fault and typically they only require a jump if left on overnight or for days at home. |
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