The lithium batteries inside an intercom have a duration of about 400/600 cichlids charge which is equivalent to well over 5 years of life if kept in perfect efficiency. This count is carried out by a chip (a micro BMS) inside the battery which analyzes the voltage of the same and, based on the data entered by the manufacturer, carries out its maintenance tasks.

The chip has various functions:

  • Cycle count.
  • Voltage measurement.
  • Calculation of the capacity.
  • Autonomy.
  • Protection.
  • Inhibition of the charge.

A New battery has a capacity of 100%, with the accumulation of charges proportionally it reduces over time until it is completely exhausted.

Lithium batteries should never be brought to 0% charge, this greatly reduces the battery life. It would be advisable never to let it fall below 0% (this happens when you leave the intercom inactive for the winter period and maybe even unloaded) even if small the self-discharge could lower the voltage too much to the point that the Chip intervenes and subsequently prevents it. charging, to prevent it from being damaged or causing damage.

We always recommend leaving the intercom with at least 50% charge, even leaving it fully charged could damage the battery, if you can turn it on and leave it on for a few hours and then recharge it at least once every 2 months. We remind you that the batteries have a limited warranty, so it is your responsibility to try to keep it in efficiency.

But what else can happen to our battery?

Let's say that we have carried out 20 charge cycles (so almost a year of standard use) the battery should be found if not at 100% capacity at 98%, but we notice a much lower duration than average (yet I have never used it) .

Two things may have happened:

  1. Inactivity for a long time can cause oxidation of the two main battery components Anode and Cadoto.
  2. Or a malfunction of the Chip.

In the first case, the battery will remain at reduced efficiency as the two containers no longer have the actual capacity.

In the second case we can try to restore the chip and the capacity.


Turn on the intercom and wait for it to turn off by itself.

Repeat this until it shuts down in a few minutes.

In this way a sort of reset of the minimum discharge is carried out (the protection ensures that it does not drop below 20% of the accumulation).

Once the intercom is completely discharged, find a charger with a low amperage maximum 400ma, if you find it lower it would be the best thing, put the intercom in charge and wait for it to be signaled that it is charged, remove it from the charge, wait for it get cold or an hour and put it on charge again.

Carry out this operation until after the intercom is charged, it signals that it is charged for a short time.

This way the energy storage should be complete for the battery capacity.

In many cases our customers have managed to restore the efficiency of their equipment.

PS. we always recommend recharging the intercom with specific or low amperage chargers.

The new fast charging models are designed not to accept more than 80% charge, this in order not to damage the battery, for a full charge we always recommend a low amperage charger.