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Why isn't the final float charge rate = 0 for a fully charged car battery?

I had cause to charge a card 12V car battery recently. I used one of these:-

battery charge

toTo top up an 80Ah lead acid battery. It initially started charging at ~4A. I then left it floating for a couple of days. The charger instructions clearly state that the float rate will never reach zero. After 48 hours, the charger ammeter was indicating something like 500mA - 750mA (the meter's pretty poor). It didn't seem to be dropping at any discernible rate so I believe those instructions.

The battery was out of the car on a bench. So my question is where is all the electricity going?

Why isn't the float charge rate = 0 for a charged car battery?

I had cause to charge a card battery recently. I used one of these:-

battery charge

to top up an 80Ah lead acid battery. It initially started charging at ~4A. I then left it floating for a couple of days. The charger instructions clearly state that the float rate will never reach zero. After 48 hours, the charger ammeter was indicating something like 500mA - 750mA (the meter's pretty poor). It didn't seem to be dropping at any discernible rate so I believe those instructions.

The battery was out of the car on a bench. So my question is where is all the electricity going?

Why isn't the final float charge rate = 0 for a fully charged car battery?

I had cause to charge a 12V car battery recently. I used one of these:-

battery charge

To top up an 80Ah lead acid battery. It initially started charging at ~4A. I then left it floating for a couple of days. The charger instructions clearly state that the float rate will never reach zero. After 48 hours, the charger ammeter was indicating something like 500mA - 750mA (the meter's pretty poor). It didn't seem to be dropping at any discernible rate so I believe those instructions.

The battery was out of the car on a bench. So my question is where is all the electricity going?

1
source | link

Why isn't the float charge rate = 0 for a charged car battery?

I had cause to charge a card battery recently. I used one of these:-

battery charge

to top up an 80Ah lead acid battery. It initially started charging at ~4A. I then left it floating for a couple of days. The charger instructions clearly state that the float rate will never reach zero. After 48 hours, the charger ammeter was indicating something like 500mA - 750mA (the meter's pretty poor). It didn't seem to be dropping at any discernible rate so I believe those instructions.

The battery was out of the car on a bench. So my question is where is all the electricity going?