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Smart Battery Chargers FAQ

Q. What do the abbreviations MF, GEL and AGM mean?

A. Gel, AGM, Vlies, MF, Calcium/Calcium and Hybrid are abbreviations for different types of lead-acid batteries

Q. What happens if I use the charger on batteries larger than you have recommended?
A. Using a small charger results in longer charge times. Sometimes this may be critical in which case you should use a larger charger. If you use the charger for maintenance charging only then you can get by using a really small charger. However, for larger batteries you need to be a little more careful, see next question.

Q. What does ripple mean and how does it affect the battery?
A. Current ripple is a measurement of how much alternating current the charger supplies. High current ripple causes high losses which costs money and generates heat in the battery. This heat mean that you must charge using a lower current to avoid gassing. Conventional chargers heat the battery up to four times. Current ripple also has other negative impacts, see Charger Academy – Current Ripple.

Voltage ripple describes the amount of alternating voltage that is mixed with the direct current output. This may cause voltage peaks that could damage sensitive electronics, see Charger Academy – Voltage Ripple.

Q. Can I charge GEL batteries?
A. GEL and all other types of lead-acid batteries can be charged using Abtcharger chargers with no problems whatsoever.

Q. It takes a long time to charge.
A. If charging takes an unusually long time, this maybe because the battery is sulphated. A battery of this type has a higher internal resistance and will not accept a charge as quickly. However, Abtcharger chargers continue to charge at the rate the battery is able to receive.

Q. How drained can a battery be before it cannot be charged by a Abtcharger charger?
A. A battery is considered as drained when the voltage is below 10.5V. However, it can still emit energy down to 7-8 volts. Most models can handle batteries as low as 1.5V.Note that some batteries can be damaged as a result of being too deeply discharged. The Abtcharger chargers try to revive these batteries through pulsing to reduce sulphating or through soft start (certain models). A battery that is below these levels is dead and needs to be replaced.

Q. Can I charge a 24V system with two serial connected 12V chargers?
A. Yes, this is perfectly ok and is actually preferable for the batteries. Connect a charger for each battery.

Q. What settings should I use?
A. It depends on the type, size and application of the battery. Read more under Battery Types & Settings for Each Charger.

Q. Can you charge a frozen battery?
A. No, the battery must be thawed first. Note that the battery has been discharged previously otherwise it would not have frozen. Check the battery carefully for cracks.

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