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Power up Your Batteries, Light up Your Life XTAR VC4 battery charger is applied to rechargeable batteries of : 3.6V/3.7V Li-ion/IMR/INR/ICR 10440 14500 14650 16340 17335 17500 17670 18350 18490 18500 18650 18700 20700 21700 22650 25500 26650 32650 (NOTE: protected 20700/21700 batteries cannot be charged.) 1.2V Ni-MH/Ni-CD AAAA/AAA/AA/A/SC/C/D. XTAR VC4 Rechargeable Battery Charger Best Materials for Best Quality ***ABS outer case: Solid and light weight; fire-proof & water proof ***PVC cover: soft with high flexibility; durable and resistant to water ***Copper cord: good electrical conductivity Multiple Protection for the batteries XTAR VC4 rechargeable battery charger performs the functions of over-current protection, over-voltage protection, over-charge protection, short-circuit protection and over-heat protection. With the multiple protection, the batteries get powered and keep active. Convenient to Charge With a USB to DC cable ( included in the package content), it is convenient to connect VC4 battery charger to power supply that with a USB port. Details of XTAR VC4 Rechargeable Battery Charger Smart LCD Screen Display Charging information is displayed in innovative tachometer-style. From top to bottom, Charging Current (A), Battery Voltage (V), Charging Capacity (mAh) and Battery Type (Li-ion/Ni-MH/...) will be displayed. 0.5A/ 1.0A Charging Current Just insert the batteries and the battery charger will choose the best current for your batteries. ***CH1& CH4 support 1.0A when only CH1& CH4 works. *** All channels will be work at 0.5 A once CH2 or CH3 is used. ***To supply enough power and charge at the best status, please use at least 2.0A output adapter. ***USB port of laptop supplies power no more than 0.9A, so it is not the first choice for normal charging, but it can be used as emergency charging. Heat-losing Stripe Crack The stripe crack is designed for heating losing, which is helpful to control the temperature and improve the charging efficiency. Upgraded Smart Chips The upgraded chips equip VC4 battery charger with functions of multiple protection, smart LCD display, 0V activation and etc. Standard Technical Specifications Model XTAR VC4 Input DC 5V 2.1A 0.5A Constant Current 500±50mA 1.0A Constant Current 1000±80mA End of Charge Voltage 4.20±0.05V / 1.45± 0.1V 0.5A End of Charge Current ≤60mA 1.0A End of Charge Current ≤100mA Size L149mm x W115mm x H35mm Net Weight 210g XTAR VC4 XTAR VC8 PLUS XTAR VC4 PLUS XTAR VC2 XTAR VC4H XTAR VC2L Add to Cart Add to Cart Add to Cart Add to Cart Buying Options Buying Options Customer Reviews 4.5 out of 5 stars 919 4.4 out of 5 stars 336 4.3 out of 5 stars 317 4.6 out of 5 stars 153 4.5 out of 5 stars 23 4.2 out of 5 stars 18 Price $18.99$18.99 $45.99$45.99 $32.99$32.99 $15.99$15.99 — no data — no data Compatible battery Apply to 3.6V/3.7V Li-ion/IMR/INR/ICR 10440/14500/14650/16340/17335/17500/17670/18350/18490/18500/18650/18700/20700/21700/22650/25500/26650/32650 1.2V Ni-MH/Ni-CD AAAA/AAA/AA/A/SC/C/D Apply to 3.6V/3.7V Li-ion/IMR/INR/ICR 10440/14500/14650/16340/17500/17670/18350/18490/18500/18650/18700/20700/21700/ 22650/25500/26650 1.2V Ni-MH/Ni-CD AAAA/AAA/AA/A/SC /C Note: Can charge protected 20700/21700 batteries. Apply to 3.6 V/3.7 V LI-ION/MR/INR/ICR 10440/14500/17335/17500/14650/16340 /17670/18350/18650/18700/18490/18500/20700/21700/22650/25500/26650/32650 1.2V NI-MH/NI-CD AAAA/AAA/AA/A/SC/C/D Note, rechargeable 21700 battery with protection plate Apply to 3.6V/3.7V Li-ion/IMR/INR/ICR 10440/14500/14650/16340/17335/17500/17670/18350/18490/18500/18650/18700/20700/21700/22650/25500/26650 Note: Can not charge protected 20700/21700 batteries. Apply to 3.6V/3.7V Li-ion/IMR/INR/ICR 10440 14500 14650 16340 17335 17500 17670 18350 18490 18500 18650 18700 20700 21700 22650 25500 26650 32650 1.2V Ni-MH/Ni-CDAAAA / AAA / AA / A / SC / C / D Note: Can charge protected 21700 batteries. Apply to 3.6V/3.7V Li-ion/IMR/INR/ICR 10440/14500/14650/16340/17335/17500/17670/18350/18490/18500/18650/18700/20700/21700/22650/25500/26650 and 1.2V Ni-MH/Ni-CD AAAA/AAA/AA/A/SC/C/D batteries. Note: Can charge protected 20700/21700 batteries. Contents Displayed Of LCD 1. Charging current gear 2. Real-time battery voltage 3. Charging capacity 4. Battery type 5.Battery channel number 1.Battery Voltage 2.Real-time power 3. Charging capacity 4.Battery Type 5.Battery Internal Resistance 6.Battery current 1.Charging current 2.Battery voltage 3.Charging capacity 4.Battery type 5.Battery channel number 1.Charging Current 2.Battery Voltage 3.Charging Capacity 1.Charging current 2.Battery voltage 3.Charging capacity 4.Battery type 5.Battery channel number 1.Charging current gear 2.Real-time voltage 3.Charging capacity 4.Adjustable button Input port DC input port DC & Type-C input port Type-c input port Micro USB Port Type-c input port Type-c input port Power input 5V⎓2.1A "QC3.0（5V⎓3A/ 9V⎓2A ) DC (12V⎓3A)" QC3.0（5V⎓3A/ 9V⎓2A ) 5V⎓1A QC3.0（5V⎓3A/ 9V⎓2A ) 5V⎓2.1A Constant Current Max 0.5A x 4 slot, 1A x 2 slot Max 3Ax1 slot , 2Ax2 / 1Ax4 / 1Ax8 slot Max 3Ax1 slot, 2Ax2 / 1Ax4 / 0.5Ax4 slot Max 0.5A×2 slot Max 3Ax1 slot, 2Ax2 / 1Ax4 / 0.5Ax4 slot Max 2Ax1,1Ax2 /0.5Ax2 slot Test Batteries' real Capacity no data ✓ ✓ no data no data no data OV Activation ✓ ✓ ✓ ✓ ✓ ✓ The grading mode no data ✓ ✓ no data no data no data Adapter NO DC 36W Adapter QC3.0 18W Adapter NO NO NO
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Imported
Advanced Charging Technology Experience three-stage charging for safer, more reliable battery care
Universal Battery Compatibility Accommodates a wide range of battery sizes and types, from 10440 to 32650, including Li-ion and Ni-MH
Intuitive LCD Display Keep an eye on charging status with our easy-to-read, energy-saving LCD screen
Versatile Power Source Charge your batteries using any 5V USB power source, including PD, QC3.0, and standard 5V adapters
Safety-Focused Design Equipped with multiple protection mechanisms to prevent charging accidents, including over-voltage, over-current, and short-circuit protection
Increasingly I need to charge/test Lithium-ion cells of various sizes. The reasons I picked this charger (XTAR VC4) instead of the Opus BT-C3400:1. I like trying out new chargers. The Opus BT-C3100/3400 is too similar to the BT-C2000 which I already own, while the XTAR VC4 has an interesting new display.2. I'm a cheapskate. The VC4 is about half the price of the C3400.3. (This I found out after my purchase) The VC4 has two wider outer slots that can accept up to D-cell. The C3400 can only accept up to C-cell.The XTAR VC4 has an unusual design. To start with, it is powered from USB port instead of from AC. This makes the unit lighter and independent from AC line voltage. On the flip side, you must already own a reliable AC-to-USB adapter that can sustain 2.1 Amp.I have tested charging Li-ion cells ranging from 14500 to 26650, and NiMH cells from AAA to D size. The charger can accept 4 cells up to 20650 size. When charging larger cells such as 26650 or D-cell, only the outer two slots can be used. The fitting is very tight for D-cell but it works.[Display]The LCD panel is divided into two halves. Each side shows the battery voltage (V) in an analog meter, and the charging capacity (mAh) in digital. If you insert more than two cells, only the status of the last two cells are displayed. But you can press the SELECT button to toggle the display between cells.The central current meter shows the maximum charging current. Typically it says '1.0A' when only the two outer slots are in use, '0.5A' when more slots are in use. However not all cells are charged at the same current at the same time. For Lithium-ion cell, the current will drop gradually while the cell is close to being fully charged. This is completely normal. I have also seen some old NiMH cells being charged at 0.2A instead of 0.5A.In addition, each channel has an LED indicator. It turns Red while charging; Green when done. This is a nice touch.[Great Features]There are several features I especially like about this charger:1. This charger is very intelligent in determining the battery chemistry. It can tell if the cell insert is NiMH, Li-ion or alkaline, and select the charging algorithm accordingly.2. Even if a NiMH cell is over-depleted to nearly zero volt, this charger can still detect it and charge it up. In contrast, most Smart chargers (such as La Crosse BC1000 or Opus BT-C2000) have problems detecting over-discharged cells.3. It can accept old cells with higher internal impedance. Apparently if a cell with higher resistance is detected, the charger switches to lower current. In contrast, many other smart chargers (such as the Panasonic BQ-CC55) will simply reject the cell.[Quirks/Improvements Needed]1. It does not have a Discharge mode to determine the true capacity of a cell. Instead, you can only estimate the capacity based on the charge a cell took in during charging - assuming the cell was fully depleted initially. Typically a cell will take in more charge than its actual capacity. For Li-ion cell the difference is negligible, but for NiMH the error can be 5% or more (especially if the cell is in bad shape).2. The current meter does not always give the correct information. For example: when I tested charging an alkaline cell, the 'NiMH' sign lights up. Current meter says charging current is 1A, but actual input to the charger is just ~100mA. That means the actual current to the cell is probably ~50mA (because the charger itself consumes ~50mA in standby mode)3. I'm not yet convinced that the VC4 correctly terminates charging of all NiMH cells. For example, I once recharged three AA NiMH cells and the VC4 reported the same charge of 2209mAh each. I then discharged those three cells on my BT-C2000, and it reported 2041/2048/1779mAh!I repeated this test with those three cells, and observed essentially the same results. Next, I tested two different cells. Charging on VC4 took in 920mAh each, but discharging on BT-C2000 reported 730/1765mAh! More investigation is needed.[Bottom Line]The XTAR VC4 is inexpensive yet very versatile. So far it works great fro me in charging Li-ion and NiMH cells of different sizes. I especially appreciate the fact that it can recharge very old or completely depleted NiMH cells. In fact it does a better job in this aspect compared to all my other advanced chargers. For this reason I give it a 5-star rating despite of its quirks.
