Nitecore UM4 USB Four-slot Battery Charger
With the UM4 Li-Ion, Li-Ion IMR, NiMH/NiCd and LiFePO4 batteries can be charged. The Nitecore UM4 charger detects the type of battery, determines the battery status, the charge status of the battery and automatically determines the correct charging procedure. The default charging current is 500mA. Depending on the battery type, this can be increased manually up to 1A and in QC mode up to 1.5A. Deeply discharged Li-Ion batteries can be reactivated in the UM4 (please refer to the operating instructions).
With the UM4 Li-Ion, Li-Ion IMR, NiMH/NiCd and LiFePO4 batteries can be charged. The Nitecore UM4 charger detects the type of battery, determines the battery status, the charge status of the battery and automatically determines the correct charging procedure. The default charging current is 500mA. Depending on the battery type, this can be increased manually up to 1A and in QC mode up to 1.5A. Deeply discharged Li-Ion batteries can be reactivated in the UM4 (please refer to the operating instructions).
With the UM4 Li-Ion, Li-Ion IMR, NiMH/NiCd and LiFePO4 batteries can be charged. The Nitecore UM4 charger detects the type of battery, determines the battery status, the charge status of the battery and automatically determines the correct charging procedure. The default charging current is 500mA. Depending on the battery type, this can be increased manually up to 1A and in QC mode up to 1.5A. Deeply discharged Li-Ion batteries can be reactivated in the UM4 (please refer to the operating instructions).
With the UM4 Li-Ion, Li-Ion IMR, NiMH/NiCd and LiFePO4 batteries can be charged. The Nitecore UM4 charger detects the type of battery, determines the battery status, the charge status of the battery and automatically determines the correct charging procedure. The default charging current is 500mA. Depending on the battery type, this can be increased manually up to 1A and in QC mode up to 1.5A. Deeply discharged Li-Ion batteries can be reactivated in the UM4 (please refer to the operating instructions).
in 36 offers
The lowest price for Nitecore UM4 USB Four-slot Battery Charger right now is $43.19 at AliExpress.com - AliExpress-226247430, compared across 27 retailers.
The all-time low was $11.62 on 13 Oct 2025 — today's price is 272% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 25 Oct 2026.
Last updated at 25/10/2026 08:19:17
NITECORE UM4 Intelligent USB 4-Slot Battery Charger for Li-Ion, LiFePO4, IMR, Ni-MH/Ni-Cd Batteries
Free delivery
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originally posted on shopee.ph
Legit product. Charges my batteries and has good UI. Be aware that it is humongous and takes a lot of space.
originally posted on imrbatteries.com
It does a wonderful job of charging batteries and keeps them topped off ! No complaints!
originally posted on imrbatteries.com
Good display rotates charge information for each cell inserted. Tons of room for xx700 batteries, like 6mm extra so no more torn wraps. -1 star for the lack of a wall block for the included micro USB charging cord.
| Battery Size | 21700 |
| Battery Chemistry | IMR, Li-ion, Ni-Cd, Ni-MH |
| Compatible Battery Sizes | 21700 |
| Included Accessories | NITECORE UM4 Intelligent USB Four-Slot Charger |
| Safety Protection | Ensuring that the cut-off voltage is always within safe limits (for IMR batteries) |
NITECORE UM4 Intelligent USB 4-Slot Battery Charger for Li-Ion, LiFePO4, IMR, Ni-MH/Ni-Cd Batteries
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nitecore UM4 USB four-slot QC Charger Intelligent Circuitry Global Insurance li-ion AA 16340 18650
Free delivery
Nitecore UM4 Intelligent USB Four-Slot Charger
Delivery $4.90
Nitecore UM4 Battery Charger - 4 Slots, USB, Display
Delivery $60.13
Nitecore charger UM4
Delivery between 28 Oct – 5 Nov $10
Legit product. Charges my batteries and has good UI. Be aware that it is humongous and takes a lot of space.
It does a wonderful job of charging batteries and keeps them topped off ! No complaints!
Good display rotates charge information for each cell inserted. Tons of room for xx700 batteries, like 6mm extra so no more torn wraps. -1 star for the lack of a wall block for the included micro USB charging cord.
| Battery Size | 21700 |
| Battery Chemistry | IMR, Li-ion, Ni-Cd, Ni-MH |
| Compatible Battery Sizes | 21700 |
| Included Accessories | NITECORE UM4 Intelligent USB Four-Slot Charger |
| Safety Protection | Ensuring that the cut-off voltage is always within safe limits (for IMR batteries) |
