Comparison Nitecore UM4 vs Nitecore UM2
Add to comparison |  |  |
|---|---|---|
| Nitecore UM4 | Nitecore UM2 | |
| Compare prices 3 | Compare prices 3 | |
| User reviews | ||
| TOP sellers | ||
Supports Quick Charge technology version 2.0. Ability to manually select charging current and voltage. | Supports Quick Charge technology version 2.0. Ability to manually select charging current and voltage. | |
Batteries charging | ||
| Charging slots | 4 шт | 2 шт |
| Supported types | Ni-Cd Ni-Mh Li-Ion LiFePO4 IMR | Ni-Cd Ni-Mh Li-Ion LiFePO4 IMR |
| Size | AAAA AAA AA C D 10440 14500 16340 (CR123) 16500 17500 17650 17670 18350 18490 18500 18650 22650 25500 26500 26650 26700 | AAAA AAA AA C D 10440 14500 16340 (CR123) 16500 17500 17650 17670 18350 18490 18500 18650 22650 25500 26500 26650 26700 |
Specs | ||
| Operation indicator | display | display |
| Independent charge channels | 4 шт | 2 шт |
| Min. charge current | 300 mA | 100 mA |
| Max. charge current | 1500 mA | 1500 mA |
| Charge current (all channels) | 750 mA | 1500 mA |
Features | ||
| Capacity measurement |  | |
| Overcharge protection | | |
| Capacity recovery | | |
| Polarity test | | |
| Overheat protection | | |
| Short circuit protection | | |
General | ||
| Movable negative contact | | |
| USB charging power | microUSB | microUSB |
| Dimensions (HxWxD) | 41x107x159 mm | 40x73x152 mm |
| Weight | 233 g | 148 g |
| Added to E-Catalog | may 2019 | may 2019 |
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Glossary
Charging slots
The number of separate slots for batteries provided in the design of the charger.
The more such slots, the more batteries can be charged in the device at a time; “multi-charge” models ( charges for 4 batteries or more) will be especially useful in cases where you have to intensively use a large number of batteries. On the other hand, this feature significantly affects the dimensions, weight and cost of the “charger”. However, it is not so significant, therefore there are models with 1 battery or 2 batteries less and they can be characterized as a tourist option.
The more such slots, the more batteries can be charged in the device at a time; “multi-charge” models ( charges for 4 batteries or more) will be especially useful in cases where you have to intensively use a large number of batteries. On the other hand, this feature significantly affects the dimensions, weight and cost of the “charger”. However, it is not so significant, therefore there are models with 1 battery or 2 batteries less and they can be characterized as a tourist option.
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.
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.
Min. charge current
The smallest current that the device can provide in charge mode. If this parameter is specified in the specifications, this means that this model has the ability to adjust the charge current (otherwise, only the maximum current is indicated).
Charging current is one of the most important parameters for any charger: see “Maximum charge current. And the general range of current adjustment depends on this indicator: the lower the minimum value (with the same maximum) — the more extensive the possibilities for setting up the "charger" for the specific specifics of work.
Charging current is one of the most important parameters for any charger: see “Maximum charge current. And the general range of current adjustment depends on this indicator: the lower the minimum value (with the same maximum) — the more extensive the possibilities for setting up the "charger" for the specific specifics of work.
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.
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.