Availability: Out Of Stock
Sku: ISD-A4

Faster, Smaller, and Smarter.
Still using AA batteries for your Spektrum DX Radio or FrSky QX7? Sick of constantly buying batteries or searching all over at shows for replacement batteries because your batteries have died? Grab some rechargeable batteries and save yourself some time and money with the iSDT A4 charger!

Convenient Operation
The charger is perfectly compatible with phone power adapters, USB ports, portable power banks and car chargers, auto-matching with the USB charging device's output power.
Fast charging is possible when combined with a QC adapter.

Multifunction Charger
Featuring automatic battery type identification, the A4 auto-assigns the optimal charging algorithm for your batteries. Fully compatible with NiMH, NiCd, Li-lon and LiFePO4 batteries. 

Full Color LED Status Indicator
Battery level, type, operation mode and information are shown clearly by full color LED indicators. 

Four Full-Time Independent Charging Channels
Compact but intricate, the A4 boasts four real independent channels for intelligent current regulation and supports hybrid charging of different types and sizes of batteries.

Integrated Protection Design
The A4 utilizes innovative battery performance detection mechanisms, intelligent power allocation, and auto-adjusting charging parameters to provide a safe and efficient charging experience.

All-Powerful USB Port
The Micro USB port can also be used to connect to a PC to update firmware and set additional parameters.


Input Power DC 5 - 9V / 1.5A
Max. Charging Power  10W
Max. Charging Current 1.00A per slot
Supported Sizes AAA, AA, 10500, 12500
Supported Types NiMH, NiCd, Li-lon, LiFePO4
Operating Temperature -10 - 40 °C
Dimensions  59 x 63 x 25 mm 
Weight 36g

Batteries not included. 

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.

iSDT A4 NiMH AA AAA Lithium ion Battery Charger

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