Availability: 340 In Stock
Sku: AOK-3002

2S-8S LiPo, Li-ion, and LiFe battery voltage checker and low voltage buzzer alarm.
Display modes: Total voltage, voltage of individual cells, voltage of highest cell, voltage of lowest cell, voltage difference between cells.
Alarm set value range: off, 2.7V - 3.8V.
Default alarm setting: 3.3V.

Made by the original manufacturer of this product, higher quality and reliability than those cheaper copies.

Orders are shipped from Columbus, the capital city of Ohio, USA.

An order placed before 2:00pm Eastern Standard Time will be shipped the same working day.

We ship on Monday-Friday by US postal service (USPS) and UPS, and Saturday morning by USPS if a local post office is open. Any order placed on Saturday morning may or may not be shipped the same day. Orders placed on Sunday and US holidays will be shipped the next working day.


Retail orders above $80 may be eligible for free shipping, including contiguous United States, Alaska, Guam, Hawaii, Puerto Rico, and APO addresses. We will use either USPS or UPS that most packages can be delivered in 3-5 working days, but not guaranteed. However, for packages contain large and heavy items, such as power supply, we may use parcel post service or UPS Surepost that may take up to 7 working days to be delivered.

USPS First Class Mail and Priority Mail, Express Mail, and UPS services can be used for domestic addresses. Tracking number and delivery confirmation will be provided to the customer when they are available. If you have not received a tracking information E-mail, please log into your account and click the "view order" link, then click "Track your order" link to find out the tracking number and ship method.

USPS Priority Mail is typically delivered in 3 working days. But very occasionally a priority mail package may be delayed for several days in the mailing system. If delivery time is extremely critical to your order, we would recommend Priority Mail Express or other couriers.

Domestic First Class Mail is only 1-2 days slower than Priority Mail in delivery. We suggest domestic customers choose First Class Mail for an order under 15 oz to save shipping cost.

Real shipping cost is calculated according to package weight and distance, and can be found in the checkout page after delivery address is specified in the fields.

Any order of $200 and above requires addressee's signature confirmation upon receipt of the package. Please contact us in advance or leave a comment in the message box if you want to waive signature confirmation.

We always check the legality of potential fraudulent orders. This procedure may lead to 1-2 working days delay in shipping in some rare cases.

We do not ship products to shipping forwarding companies. Any order shows this kind of address will be cancelled and refunded without notification.


DHL, DHL Express, US Postal Service (USPS) First Class Mail, Priority Mail, and Express Mail (EMS), and UPS services can be selected for international addresses. Shipping cost is calculated according to package weight and distance, and can be found in the check out process. A package usually takes around 7-10 days to be delivered, or occasionally up to 45 days depending on the processing speed in your country, especially in some countries such as Brazil and Russia.

USPS First Class Mail is a budget shipping method. As soon as a First Class Mail package left USPS Chicago hub there will be no tracking information available. If you need detailed tracking information and timely delivery please do not use this shipping method.

Presently we cannot ship lithium batteries internationally by US Post Service or any other air shipping method. Please select UPS Ground if your order contains LiPo or LiFe battery.

We do not ship products to shipping forwarding companies. Any order shows this kind of address will be cancelled and refunded without notification.

AOK Digital Voltage Checker and Alarm

Customer Reviews

Based on 12 reviews
Douglas R.

I wish that the device had at least a small user manual. Right now I understand that the discharge stops at a preset setting. But I need to know what that setting is. And can I change it? Doug Rossman ([****])

don j.
lipo tester alarm

great product quality built real deal not like crappy knock offs

James D.

Works great.

Robert B.

Got my SKYRC BD250 Discharger. The unit works manually just fine. However there is software available to operate the discharger and analyze your LiPo. The software was difficult to find on the manufactures website. most of the download links did not work. Finally found a page that would allow me to download and installed in on my Windows 10 laptop. Instillation was uneventful. Once installed I cant get the software to work. I continuously get a message that there is no device (battery) connected and the software will not start.
I researched this problem and was not able to find a fix. I attempted to re-download the software so that I could re-install it and SKYRC's website triggered a virus warning on my computer.
So if your looking to use the SKYRC software to analyze your Lipo battery I would give the BD250 a pass.

Mike C.
Battery Discharge Station

Built the battery discharge station shown in April 2021 Model Aviation Magazine, Works very well, nifty piece of equipment to add to my arsenal.

Just added to your wishlist:
My Wishlist
You've just added this product to the cart:
Go to cart page