Overview
The Fastrax Scale LiPo Battery Box Voltage Checker/Alarm for 2S/3S batteries is an essential accessory for any serious RC enthusiast in the UK who runs LiPo-powered models. Whether you operate RC cars, RC buggies, RC crawlers or any other scale RC vehicle, maintaining optimal battery health is crucial for performance, safety and longevity. This dedicated voltage checker and alarm system provides a convenient, portable solution for monitoring your LiPo battery cells before, during and after your RC sessions, helping you avoid the common pitfalls of over-discharging or over-charging that can damage expensive battery packs.
LiPo batteries are the industry standard for modern RC vehicles due to their high power density and consistent performance, but they require careful management to remain safe and functional. Over-discharging a LiPo cell below its safe minimum voltage (typically 3.0V per cell) can cause permanent damage and create fire hazards during recharging. This is where the Fastrax Scale LiPo Battery Box Voltage Checker/Alarm becomes invaluable—it gives you instant visibility into the state of charge of your 2S and 3S LiPo packs, allowing you to make informed decisions about when to charge or retire a battery from service.
Designed specifically for scale RC applications, this compact checker fits neatly into your pit box or toolbag, making it the perfect companion for track days, club meetings, or casual bashing sessions. The integrated alarm function alerts you when battery voltage drops to unsafe levels, providing an extra layer of protection for both your equipment and your safety. If you're serious about getting maximum life from your LiPo batteries and want peace of mind knowing your packs are in good condition, the Fastrax Scale LiPo Battery Box Voltage Checker/Alarm is a must-have addition to your RC toolkit.
Key Features
- 2S/3S LiPo Compatibility — This voltage checker is specifically designed to work with both 2-cell and 3-cell LiPo battery packs, covering the vast majority of scale RC applications from small crawlers to mid-sized buggies and off-road vehicles.
- Integrated Voltage Alarm — The built-in alarm function actively monitors your battery voltage and provides an audible or visual alert when cells drop below safe operating thresholds, preventing accidental over-discharge damage.
- Compact Battery Box Design — The integrated battery storage box keeps your checker and spare LiPo packs organised and protected in a single, portable unit that's easy to transport to the track or your local RC club.
- Instant Voltage Reading — Get immediate feedback on the current state of charge of your LiPo packs without needing a computer, charger, or complicated software—simply plug in and read the display.
- Fastrax Quality and Reliability — Fastrax is a recognised manufacturer of scale RC parts and accessories, and this voltage checker reflects their commitment to practical, durable products that help keep your RC experience safe and enjoyable.
Technical Performance
The Fastrax Scale LiPo Battery Box Voltage Checker/Alarm provides straightforward, essential monitoring functionality for 2S and 3S LiPo battery packs. The device is engineered to give you clear, instant voltage readings for each cell in your LiPo pack, allowing you to quickly assess whether your batteries are ready for action or need charging. The integrated alarm system serves as a failsafe, alerting you when voltage levels drop into the danger zone—typically below 3.0V per cell—which is the critical threshold where LiPo cells can suffer irreversible damage. This level of protection is invaluable whether you're running 2S packs in small-scale RC crawlers and trail trucks, or 3S packs in more powerful buggies and off-road racers. The compact box design means your checker is always protected and organised, ready to pull out at a moment's notice during your RC sessions. Built to the standards you'd expect from Fastrax, this checker combines simplicity with reliability, making it suitable for beginners who are learning proper LiPo care as well as experienced competitors who demand quick, accurate diagnostics in the pits.
What's in the Box
- Fastrax Scale LiPo Battery Box Voltage Checker/Alarm unit
- Integrated battery storage box
Frequently Asked Questions
- Why do I need a dedicated LiPo voltage checker for my RC car? — LiPo batteries are high-performance power sources that require careful monitoring to remain safe and functional. Allowing a LiPo cell to discharge below 3.0V can cause permanent damage and create potential fire hazards during recharging. A dedicated checker like this Fastrax model gives you quick, reliable voltage readings so you can make informed decisions about when to charge your packs and when to retire them from service. This is especially important if you run multiple LiPo packs throughout a day of RC bashing or racing.
- Is this voltage checker suitable for beginners? — Absolutely. This is actually one of the most important tools a beginner RC enthusiast can own. Learning proper LiPo battery management from the start will save you money in the long run and keep your RC experience safe and enjoyable. The Fastrax checker is designed to be straightforward and easy to use—simply plug in your battery and read the display. The integrated alarm provides an extra layer of protection by alerting you if voltage drops too low.
- What LiPo battery sizes does this checker support? — This model is designed specifically for 2S and 3S LiPo packs, which covers the vast majority of scale RC applications. Whether you're running small 2S packs in RC crawlers and scale trail trucks, or more powerful 3S packs in buggies and off-road vehicles, this checker will give you accurate voltage readings for all your cells.
- How does the alarm function work? — The integrated alarm monitors the voltage of your LiPo pack and provides an alert—typically audible or visual—when cell voltage drops below safe operating levels. This failsafe feature ensures you never accidentally over-discharge your batteries, which would require them to be carefully restored (or discarded) rather than simply recharged and returned to service.
- Can I use this checker with my RC buggy, crawler, and truck? — Yes, as long as your models use 2S or 3S LiPo packs. This makes the Fastrax checker a versatile addition to any UK RC enthusiast's pit box. Whether you run ready-to-run RC buggies, RC crawlers, scale trucks, or other LiPo-powered vehicles, this single checker will handle voltage monitoring across your entire RC fleet.
- What should I do if the alarm goes off? — If the alarm indicates low voltage, it means one or more cells in your LiPo pack have dropped below the safe minimum threshold. Stop using the pack immediately and charge it using a quality LiPo charger. If a cell refuses to charge properly or shows significantly lower voltage than its companions, the pack may be damaged and should be retired from service and safely disposed of.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the FASTRAX SCALE LIPO BATTERY BOX VOLTAGE CHECKER/ALARM 2S/3S FAST2394BK today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
- Brand: Fastrax
- Product Code: FAST2394BK
- EAN: 5056135737033
- Compatibility: 2S and 3S LiPo batteries
- Features: Integrated voltage checker and alarm system
- Design: Battery box with integrated checker
- Type: Battery voltage monitor and alarm
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
