Independent charge channels
The number of independent charging channels provided in the design of the charger.
If the voltage, charging current and other parameters in this model are regulated on all battery slots at the same time, this means that the device has only one channel. The presence of several charging channels allows you to set your own operating parameters on separate slots and, accordingly, simultaneously charge different types of batteries in one device. In this case, the channel can cover both one slot and several: for example, many models for 4 batteries have only 2 channels (one for every 2 slots).
The abundance of channels expands the capabilities of the "charger" and will be especially useful in cases where you often have to charge different types of batteries; on the other hand, it significantly affects the cost of the device.
Charge current (all channels)
The highest current provided by a multi-channel charger (see "Independent channels") at full load, with all slots (and, accordingly, channels) operating. In fact, a guaranteed maximum current provided by a multi-channel charger, regardless of the number of channels involved.
For the total charge current, see “Maximum charge current. Here we note that the full load is a rather complex mode in which the current strength can decrease. Therefore, this parameter is specified separately.
Overcharge protection
A function that prevents overcharging is the accumulation of an excess amount of energy by the battery installed in the charger. Overcharging is highly undesirable for any type of battery, and can lead to a variety of unpleasant consequences, from degraded performance to overheating and fire. To avoid this, chargers may be provided with automatic devices (
overcharge protection), which monitor the level of charge and automatically turn off the battery upon completion of the process.
Polarity test
A system that determines the location of the "plus" and "minus" of the connected battery and determines whether these contacts correspond to the contacts of the charger itself. The capabilities of such systems may be different: some, in the event of an error, issue a warning signal and block the power supply, others are able to automatically switch the polarity on the contacts, depending on which side the battery is installed. In any case,
checking the polarity minimizes the possibility of connection errors and the corresponding consequences.
Fault detection
A diagnostic system capable of detecting faulty batteries, disconnecting them from power and notifying the user. The
fault detection function is useful not only for checking the performance as such: a battery malfunction that is not detected in time is fraught with equipment damage, and in some cases even fires.
In box
In addition to the main charger, the package may include
batteries,
cigarette lighter adapter,
adapter to another type of battery and
bag (case). More about them:
- Battery. Some modern chargers can be equipped with batteries - of course, the latter are best suited for this model. Buying such a kit is often more convenient than buying a "charger" and batteries separately (at least it's faster).
— Cigarette lighter adapter 12 V. Presence of a charger adapter for connection to a car cigarette lighter socket. For more information about this connection, see "Charging from the cigarette lighter"; here we note that not all models with the possibility of such charging are initially equipped with auto adapters. Therefore, if it is important for you to be able to connect the charger to the cigarette lighter out of the box, you should pay attention to the models in the appropriate configuration.
- Battery adapters. Such adapters allow you to use the charger with batteries of "non-native" sizes (see above), and, as a rule, larger than standard ones. For example, a model for AA and AAA batteries can be equipped with adapters for C or even D. This is more convenient than using a charger that was originally designed for large sizes: the device turns out to be more compact, and if necessary, a large battery is connected...without problems through an adapter.
- Storage bag. The bag plays the role of a protective cover and can be used not only for storage, but also for transporting the charger. At the same time, it often provides additional compartments for various items - both complete, such as an external power supply, and additional, such as batteries. Therefore, and also because it fits optimally in size, a complete storage bag is much more convenient than impromptu cases.
