Comparison Alligator JS845 vs Alligator JS843

Rated starting current of the starter or booster (see "Type").

In this case, we mean the current that the device in the engine start mode can produce for a relatively long time (at least 30 s, or even more). This indicator must not be lower than the rated starting current consumed by the starter of the car — otherwise the device simply does not have enough power to effectively scroll the starter and start the engine. Information about the required starting current can be clarified by the documentation for the machine, or by the characteristics of the battery that is used in it as standard. For most passenger cars, this figure lies in the range from 200 to 400 A ; less powerful starting devices are intended mainly for motorcycles and other similar vehicles, and more powerful ones for buses, trucks and other heavy equipment, among such “starters” there are models for 400 – 600 A and even more.

Peak inrush current of the starter or booster (see "Type").

Peak current is the highest current that the device can deliver without problems for a short time (1 – 2 s). This current is noticeably higher than the nominal starting current (see above), which corresponds to the operation of a car starter: starting to spin up, the starter consumes a very high current, which, however, decreases almost immediately.

The peak inrush current of the ROM or booster must not be less than the peak inrush current of the starter. You can specify the latter according to the documentation for the car, or according to the characteristics of a regularly used car battery.

Capacity of the own battery provided in the design of the starter-charger.

As a rule, boosters and launchers with a power bank function are equipped with their own batteries (see “Type”). The main purpose of such a battery from the point of view of helping to “light up” is to provide the power necessary to start the engine. However, in some models the battery is responsible for other functions, such as the built-in compressor or flashlight. The larger the battery capacity, the longer the device can operate, and the more tasks it can perform on a single charge.

In starting devices with the powerbank function, this parameter is also given to estimate how much energy the battery can accumulate and then transfer to connected gadgets. It is important to consider that there is a nominal (declared) and real capacity - the latter is always less, because it takes into account the inevitable losses during energy conversion. Typically the difference is from 30 to 40%, i.e. a model with a conventional battery capacity of 10,000 mAh will not fully charge a smartphone with a 3,000 mAh battery three times, but at best will provide two power cycles, because in practice its working capacity is about 6,000 mAh. Therefore, it is not entirely correct to compare the mAh values of your gadget’s battery with the nominal capacity of the built-in battery - you should definitely take into account that the real capacity is always less than the “rated” one.

The presence of a USB C connector in the design of the ROM for recharging gadgets with the appropriate cable. Due to the popularization of this port, such a solution does not look unusual, but rather helps to keep up with the times.

In addition to the number of such ports, the voltage and current on which the port operates, as well as the maximum charging power, can be indicated.

- The strength of the current. The maximum current output through the USB type C connector to a charging device. Note that different ports of the charging station can output different current (for example, 1.5 A and 2.1 A). In this case, the highest current strength is usually indicated.

— Power. The maximum power in watts (W) that the charging station is capable of delivering to one rechargeable gadget. The high output power of the USB type C port allows you to speed up the charging process. However, the corresponding power must be supported by the device being charged - otherwise the speed of the process will be limited by the characteristics of the gadget.

The power output of the device in wireless charging mode. As the name suggests, this type of charging transfers energy to the device being charged literally "through the air". However, the range of such transfer is only a few centimeters, so the gadget usually has to be placed directly on the ROM. However, it is still much easier and more convenient than fiddling with connecting wires, and the connectors do not wear out.

As for the power, the higher it is, the faster the external device can be charged. Of course, to use all the possibilities of wireless charging, the gadget being charged must also support the corresponding power.

External power sources for which the device is designed.

— 230 V. Powered by a normal household network. Most devices with such a power supply allow connection directly to the outlet; however, if the power consumption exceeds 3.5 kW, another method of connection may be required — directly to the panel. These details should be clarified in the instructions.

— 12/230 V. Possibility of power supply both from a standard 230 V household network and from a 12-volt vehicle on-board network. This option is found mainly among boosters, while the connection to the 12 V network is usually carried out through the cigarette lighter and is used to charge the built-in battery of the device.

— 400 V. Powered by 400 V three-phase networks. Three-phase connection is not as common as 230 V, it is available mainly in workshops, large car park garages and other industrial premises. Therefore, power supply from 400 V is provided only in the most powerful "starters", for which 230 V is no longer enough. Such devices are designed mainly for heavy equipment such as buses, trucks, bulldozers, etc.

— 230/400 V. Ability to connect the device to both 230-volt and 400-volt networks. See above for details on the features of both. Here we note that such versatility is found in some high-power units that regularly use three-phase networks, however, in the absen...ce of such a connection, they can also work from single-phase ones. Note that such a device, most likely, will not be able to connect to a regular outlet — it will need a special connection format.

— From the cigarette lighter. Connection to the car's on-board network through a standard cigarette lighter socket. In this case, it is meant to work only from the cigarette lighter, without any other options for external power supply. This option is extremely rare (more often such a connection is combined with the ability to work from 230 V, see above for details). It is used in some models of chargers designed to work in the "cigarette lighter to cigarette lighter" format. This format allows you to charge the battery directly in the car without removing it: one plug is inserted into the cigarette lighter of the car with the engine running, which plays the role of a “field power station”, the second plug is inserted into the cigarette lighter of the car, where the rechargeable battery is installed.

— From the generator. Models designed for connection to generators with unstable voltage indicators. The most popular way to use such devices is to connect directly to a car generator, hence the name. However, in addition to this, compatibility with less traditional energy sources, such as solar panels or wind turbines, may be envisaged. Anyway, with such a connection, it is necessary to constantly monitor signal fluctuations and respond to them, leaving the current parameters at the output practically unchanged; only automatic charger devices are fully capable of this (see "Type").