Stupid question about dead car battery (car wouldn't start)

[baludoy]

Do i need to disconnect the battery in order to safely and effectively use this digital battery charger



is it safe to leave it on the engine bay while it's charging the car battery?

How long does it need to recharge the battery?

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[red_one]

Do i need to disconnect the battery in order to safely and effectively use this digital battery charger



is it safe to leave it on the engine bay while it's charging the car battery?

How long does it need to recharge the battery?

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Read the user manual that came with the battery charger.

No need to disconnect the battery.

Automatic chargers will switch to trickle mode after battery full so can keep connected to battery.

How long to charge depends on the total capacity and remaining charge of battery. Divide by charging current.

Example, if you have 80Ah battery that is totally drained. Divide by 10A from your charger. It will take 8 hours.

If you are just topping up the charge, it will be much faster.

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[kisshmet]

Do i need to disconnect the battery in order to safely and effectively use this digital battery charger



is it safe to leave it on the engine bay while it's charging the car battery?

How long does it need to recharge the battery?

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If its for the first time you will use that contraption, its safe to remove a battery terminal (preferably the red terminal or the positive).

Its better safe than sorry, that thing you bought could be defective out of the box (shorted). Disconnecting the positive or red terminal to the battery isolate your cars electrical and electronic circuits from the battery and the new gadget you will attach to your battery.

Negative terminal shouldnt be disconnected because its always connected to the ground and the body of all cars are good ground. Should the new gadget you have bought is defective or shorted the ground or the body of your car is a good place to absorb the high current that could flow

The worst case scenario when theres poor grounding, the battery can explode in your face. Batteries contain acids that could blind you when it reach your eyes

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[12vdc]

Negative terminal shouldnt be disconnected because its always connected to the ground and the body of all cars are good ground. Should the new gadget you have bought is defective or shorted the ground or the body of your car is a good place to absorb the high current that could flow

In Automotive tech practice, it is always the negative terminal of the battery that should be disconnected to isolate the common ground(-). The explanation is that chassis of the car being negative potential has the widest area and risk of accidentally shorting positive to the common ground will be less if the negative potential from the battery is removed(ie accidentally dropping a live positive lead of an accessory to the chassis or any part of the body).

Those smart chargers can detect any short or low internal resistance inside the battery and they automatically shut or give error message if such errors are detected.

[Janemar]

Do i need to disconnect the battery in order to safely and effectively use this digital battery charger



is it safe to leave it on the engine bay while it's charging the car battery?

How long does it need to recharge the battery?

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Maki butt in lang since bored. LOL.

I see your car is monty/strada? So yes, you can directly hook up your charger sa batt without removing the terminals.

For newer cars with smart electrical system, be sure to clamp the charger positive clip to positive of battery terminal and negative clamp to a good body ground and not directly to battery (-) terminal. This is because the PCM/BCM is monitoring the state of charge of your battery real time, 24/7, and the usual position of the ammeter/load sensor is act negative terminal connector.

I can confirm 10th gen civic and new ford cars now have this system, not sure sa other brands.

[jick.cejoco]

Some cars like BMW, there are remote jump start terminals away from the battery. Some models have the battery in the trunk, some inside the passenger cabin behind the front passenger seat, some behind the driver's seat and will have jump terminals under the hood.
The '70's Corvette have them behind the seat subfloor, the Cadillac Allante behind the passenger seat as well as the Pontiac Fiero. There are many others to mention.

[Walter]

Basically they put the extension terminals in the engine bay where it they can be easily accessed ... for cars that have their batteries in other location(s) ... trunk, under rear seat, under front seat ...

[baludoy]

^ the manual's instructions are in general terms. Just like any other loosely translated chinese literature

So it's ok to leave it resting atop the engine bay while it's operating?

I'll just use it for topping-up purposes only

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[red_one]

^ the manual's instructions are in general terms. Just like any other loosely translated chinese literature

So it's ok to leave it resting atop the engine bay while it's operating?

I'll just use it for topping-up purposes only

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Yes, you can keep it atop the engine bay.

SON-10A is old model. The new models are SON-10A+ and SON-20A+ with improved charging and enclosure.

[WallyWest]

Yes, you can keep it atop the engine bay.

SON-10A is old model. The new models are SON-10A+ and SON-20A+ with improved charging and enclosure.

Is the son-20a any good? I'm eyeing a Vgate which is around 3.8k that seems to be similar in operation but still cheaper than a Ctek. Ok na ba ito for maintenance purposes o mas maigi pa ring mag-invest sa Vgate o Ctek?

[red_one]

Is the son-20a any good? I'm eyeing a Vgate which is around 3.8k that seems to be similar in operation but still cheaper than a Ctek. Ok na ba ito for maintenance purposes o mas maigi pa ring mag-invest sa Vgate o Ctek?

Depends on what you are looking for. SON-20A+ is Automatic 3-stage 20A Charger.

Since you have the budget, I suggest this one. Automatic Smart 7-stage 8A Battery Charger Desulfator Maintainer with Reverse Pulse. Just P3,000.

[WallyWest]

Depends on what you are looking for. SON-20A+ is 3-stage charger.

I suggest this one. Automatic Smart 7-stage 8A Battery Charger Desulfator Maintainer with Reverse Pulse. Just P3,000.

Thanks, I'll add this to my wishlist, hehe.

[dr. d]

^ the manual's instructions are in general terms. Just like any other loosely translated chinese literature

So it's ok to leave it resting atop the engine bay while it's operating?

I'll just use it for topping-up purposes only

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yespo.
the manual is written for "worst case scenarios".

[baludoy]

I finally Tried it yesterday [emoji4]



pag pumapalo na ng 0 (intermittently) fully charged na iyong batt? Very unclead iyong manual about this

Ps pls excuse the dusty engine bay 🐷

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[Walter]

Avoid attaching charger directly to the negative terminal ... clamp it on any exposed metal in the engine ...

[dr. d]

Avoid attaching charger directly to the negative terminal ... clamp it on any exposed metal in the engine ...

bakit daw, po?
kasi, that terminal is usually the most convenient place to clamp it on.

[Walter]

bakit daw, po?
kasi, that terminal is usually the most convenient place to clamp it on.

For safety reasons ... not really sure why ... it's just standard practice ...

[jick.cejoco]

For safety reasons ... not really sure why ... it's just standard practice ...

Two reasons why:

1. To avoid Sparks near the battery specially if the battery is gassing- explosively flammable hydrogen gas,



2. So that if the battery fails to fully or efficiently charge, to force you to clean the battery post or connection.

[12vdc]

I finally Tried it yesterday [emoji4]

pag pumapalo na ng 0 (intermittently) fully charged na iyong batt? Very unclead iyong manual about this

Yes it means the charger is not pumping current to the battery, or its on trickle charge mode.

The numbers you are seeing is the output current, the higher the larger current you could hear the fan RPM shoot up to cool down the charger during high current operation.

[red_one]

I finally Tried it yesterday [emoji4]



pag pumapalo na ng 0 (intermittently) fully charged na iyong batt? Very unclead iyong manual about this

Ps pls excuse the dusty engine bay [emoji200]

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As already mentioned above, you better connect the negative clip to chassis or ground point or any exposed metal part.

If you look at the photo of my charger in previous post, the negative clip is connected to the engine hook (maybe it is dark so not clearly seen). Only the positive clip is connected to battery positive.

0 on the display means charging finished or battery full. You can now disconnect the charger.

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