Review: ViFly WhoopStor V2 1S LiPo LiHV Battery Charger

by Oscar
Vifly Whoopstor V2 1s Lipo Lihv Battery Charger

The ViFly WhoopStor V2 is probably one of the most feature-rich 1S Lipo chargers on the market right now for tiny whoops. It can storage charge your batteries and supports both PH2.0 and BT2.0 connectors.

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Check out my list of recommended tiny whoops and accessories.

Where to Buy?

Update (May 2023): There is a new version, Whoopstor V3! 

You can get the WhoopStor V2 Charger from these vendors. Make sure to get the V2. If you have the WhoopStor V1, you can try to email ViFly customer support and arrange a free upgrade to the V2, however you have to pay for the postage as far as I know.

Vifly Whoopstor V2 1s Lipo Lihv Battery Charger Bt2.0 Ph2.0

WhoopStor V2 Specifications

  • Input connector: XT60, DC(5.5*2.1mm), USB-C(PD3.0, QC2.0, BC1.2)
  • Input voltage range: 7V-21V (XT60 2S-5S Battery), 9V / 12V (USB-C)
  • Max input power: 30W
  • Max charging current: 0.9A/port
  • Battery Connection: PH2.0 & BT2.0
  • Battery type: LiHV 4.35V / LiPO 4.20V
  • Storage voltage: 3.85V
  • Max discharge power: 1W/port (0.26A at 3.8V)
  • Dimensions: 101x49x22mm

Vifly Whoopstor V2 1s Lipo Lihv Battery Charger Bottom Heatsink

The Pros and Cons of WhoopStor V2

The WhoopStor V2 has 6 output ports, it can charge up to 6 batteries at the same time. The 6 ports are independent of each other, so it doesn’t matter what voltages the 6 batteries are at when you plug them in. Although there are two connectors for each port (PH2.0 and BT2.0 connectors), you shouldn’t connect two batteries to the same port, only 1 battery per port is recommended.

It has both BT2.0 and PH2.0 connectors, these are the two main battery connectors tiny whoops use these days.

It has a nice LED screen that displays the voltages of all batteries, the input voltage and charge current.

The biggest selling point of the WhoopStor V2 charger perhaps is the ability to storage charge and discharge LiPo batteries. This is one of the very few 1S LiPo chargers that can do this.

That’s where the name of the charger came from, “Whoop” as in Tiny whoop and “Stor” as in “Storage charge”.

Why is storage charging so useful? Well, often you don’t get to use all of your fully charged batteries, leaving them fully charged for too long is bad for battery health and performance. Therefore it’s best to discharged them and bring the voltage down to 3.85V – the storage voltage. Sometimes you don’t want to leave your batteries empty for too long either, and you can bring them to storage voltage, and that will speed up charging the next time you use them.

Discharging speed is decent, at 3.8V the discharge current is up to 0.26A, which would take about 30-40mins to bring a fully charged battery (4.35V) to storage voltage (3.85V)

Because of the discharging capability, there is a huge heatsink on the bottom of the charger for cooling. However the WhoopStor V2 doesn’t have rubber feet so it’s not very stable on hard surface.

It supports both regular LiPo and HVLi Battery (4.20V and 4.35V), you can select it by simply using the slider switch.

You can power this charger via USB-C, XT60 and or barrel connector. It takes 7V to 21V (2S to 5S), unfortunately it doesn’t support 6S LiPo input.

How to Use Vifly WhoopStor V2 Charger

Charging is easy, simply long press the only button on the charger to activate charging on all ports.

You can hot swap the batteries after the charging has started, and the charger will automatically detect the battery and charge it. You don’t need to wait for all the batteries to finish charging. To stop charging, simply unplug the battery or long press the button again, that will stop all the ports from charging.

You can change the charge current between 0.2A and 0.9A (with 0.1A increment) by single pressing the button while it’s not charging. Unfortunately charge current applies to all port, you can’t adjust it for individual port.

Each port has an LED indicator:

  • Off: not charging
  • Red: charging
  • Flashing red: nearly fully charged
  • Yellow: Storage charging
  • Flashing yellow: nearly finish storage charge

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Paul Richland 19th December 2022 - 4:59 pm

My Whoopstar says the batteries are 4.35V when charged, but they are only 4.31V. Is there a way to adjust the charger?

Mezri 29th November 2022 - 9:56 am

Hello, Please is there any software to calibrate the 6 ports …2 of them are showing higer voltage then the others ? Thank You Very Much.

Stephen Matthews 14th November 2022 - 2:42 pm

From all I have read about this charger, I never see recommended power options for it. I do not want to have to charge and then discharge a larger battery to charge 1s batteries, would you be so kind as to list a few power bricks and USB-C options for this device, thanks
WhoopStor V2

KalooNie 7th March 2023 - 12:46 pm

I know I’m late, but just in case anyone needs it:

Input connector: XT60, DC (5.5*2.1mm – this is for a power supply brick, like for a laptop), USB-C (PD3.0, QC2.0/3.0, BC1.2)
Input voltage range: 7V-21V (XT60 2S-5S Battery, DC), or a 9V or 12V (USB-C superfast wall adapter charger)
Minimum input power: 30W (I have used a 25w USB-C adapter, and it seemed fine at 8.7v under a 1C charge load, but I recommend 30W (or more if you have a higher one for a phone) if using USB-C to be safe and efficient. You can go higher in watts, as it will only draw what it needs.

I switched to a power supply brick. I bought a 12V 5A 60W AC to DC Power Supply Adapter, 5.5×2.1mm & 2.5mm Plug (it supports both in one plug), AC 100-240V to DC 12V. I didn’t need more than 5 amps because I use 450 mAh batteries and charge at 0.5A (slightly over 1C). Charging at (0.5A x 6) 450 mAh batteries = 3A. Even with 650 mAh at 0.7A x 6, that’s 4.2A. If you need to charge up to 0.9A x 6, get a power supply that can handle 5.4A. Mine was on Amazon (Facmogu 3 Prong US Plug 12V 5A 60W).

Happy flying :)

John Samuel 19th September 2022 - 8:57 pm

i want to power this from a wall outlet.And want to charge 6 cells simultaneously. Can you please tell the specifications of an “ideal” power adapter to accomplish this.I do have 8.4 V 3A Li-on charger with a barrel output connector.

Oscar 19th September 2022 - 9:21 pm

It takes 7V-21V DC, and input power is rated for 30W, so any Power supply with a voltage output within that voltage range, and more than 30W should work.
That should be really easy to find.
Just search on Amazon or eBay for 12V 50W, or 60W, or 100W PSU, there should be plenty of options that cost less than $20 or $30.
You might need to modify the output to an XT60 connector if it doesn’t already have a barrel connector, but that’s easy to do.

MrMoon 11th July 2022 - 7:24 am

Would it be possible/easy to change the PH2.0 connectors to GNB27?

Oscar 11th July 2022 - 11:05 am

Not impossible but not easy for sure. Those connectors are soldered to PCB.
Perhaps easier to make some adapters instead, so you get to keep the original PH2.0 connectors too.

Doug 3rd June 2022 - 3:13 am

The whoopstor has an OLED screen per the manual that ships with the charger