> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 3 x AAA Battery Holder with On/Off Switch and 2-Pin JST-PH **Type:** Product page · **SKU:** ADA727 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/3-x-aaa-battery-holder-with-on-off-switch-and-2-pin-jst.html ([markdown](https://core-electronics.com.au/3-x-aaa-battery-holder-with-on-off-switch-and-2-pin-jst.html.md)) This battery holder connects 3 AAA batteries together in series for powering all kinds of projects. Adafruit spec'd these out because the box is slim, and 3 AAA's add... ## Pricing - **Price:** $5.40 (inc GST) — $4.91 AUD, exc GST - **Quantity discounts:** 10+ $4.76 (exc GST) · 50+ $4.66 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 7 today, and up to 500 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA727:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA727:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description This battery holder connects 3 AAA batteries together in series for powering all kinds of projects. Adafruit spec'd these out because the box is slim, and 3 AAA's add up to about 3.3-4.5V, a very similar range to Lithium Ion/polymer (Li-Ion) batteries and have an on-off switch. That makes them ideal for use with 3.3V projects that have a 2-pin JST connector meant for one of Adafruit's Li-Ion/Poly batteries. (Of course, you can't recharge them like Li-Ion/Polys, so don't try to plug this into one of Adafruit's Li-Ion/Poly charger boards!) Fits any standard AAA battery. When using rechargeable NiMH the output voltage will range from about 3.7V with charged batteries to 2.7V at the end of life with a nominal voltage of 3.6V. When using alkalines, the output will range from 4.6V with new batteries to 3.3V at the end of life with a nominal voltage of about 4.5V The polarity matches that of Adafruit's [2-pin JST cable](https://core-electronics.com.au/jst-2-pin-cable.html) and [Li-Ion/Poly batteries](https://core-electronics.com.au/#). Uses a genuine JST connector so it wont 'catch and tear' in JST connectors. ## Technical Details Box Dimensions: 2.5" × 1.45" × 0.62" Cable: 6" long, terminated with a genuine JST-PH 2 pin connector ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg) ## Guides for this product - [Micro:bit Temperature and Humidity Sensing](https://core-electronics.com.au/guides/micro-bit/Micro_bit_Temperature_and_Humidity_Sensing/) - [Micro:bit Light and UV Sensing](https://core-electronics.com.au/guides/micro-bit/Micro_bit_Light_and_UV_Sensing/) - [Micro:bit Soil Moisture Sensor](https://core-electronics.com.au/guides/micro-bit/microbit-soil-moisture-sensor/) ## Videos for this product - [Micro:bit Soil Moisture Sensor](https://core-electronics.com.au/videos/microbit-soil-moisture-sensor) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/a/d/ada727-1.jpg)