Overview
The Etronix Li-Po Saver 3-Cell (ET0551) is an essential accessory for any RC enthusiast in the UK who operates lithium polymer (Li-Po) batteries. Whether you're running RC cars, trucks, buggies, or any other RC vehicle type, protecting your expensive Li-Po battery packs from over-discharge is crucial for maintaining their longevity and performance. This simple yet effective device offers intelligent visual monitoring that helps you avoid the costly mistake of over-discharging your batteries, which can permanently damage them and reduce their lifespan. The Etronix Li-Po Saver range has become a trusted choice among RC hobbyists across the United Kingdom who take battery care seriously.
Designed specifically for 3-cell Li-Po batteries, the Etronix Li-Po Saver 3-Cell provides real-time feedback through an integrated LED light indicator that warns you when your battery pack is approaching dangerous voltage levels. This means you can monitor your battery's state during use and take action before irreversible damage occurs. The device is part of a flexible product family that includes 2-cell and 4-cell versions, making it easy to find the right saver for whatever Li-Po configuration you're using in your RC setup. At just £3.39, this is one of the most cost-effective ways to extend the life of your Li-Po packs and avoid expensive replacements.
If you're a regular RC car user, RC buggy enthusiast, or anyone who invests in quality rechargeable batteries, the Etronix Li-Po Saver 3-Cell is a must-have item in your toolkit. It's equally valuable whether you're a seasoned RC competitor or a weekend basher exploring the RC hobby for the first time.
Key Features
- LED Light Battery Warning System — The integrated LED light provides visual indication of your Li-Po battery's condition, alerting you when over-usage is occurring and the battery is being discharged beyond safe limits, helping you make immediate decisions to protect your investment.
- Designed for 3-Cell Li-Po Batteries — This specific version is engineered and calibrated for 3-cell (3S) Li-Po battery packs, ensuring accurate voltage monitoring and warning thresholds that are perfectly matched to 3-cell chemistry and specifications.
- Extended Battery Life — By monitoring discharge and warning you before dangerous over-discharge occurs, the Li-Po Saver helps extend the overall lifespan of your precious battery packs, saving you money on replacements over time.
- Simple Visual Indication — The straightforward LED light system requires no complicated setup, no software, and no learning curve—simply use the device and watch for the warning light during your RC sessions.
- Part of a Flexible Range — Etronix offers this saver in 2-cell, 3-cell, and 4-cell versions, allowing you to protect all your different Li-Po battery configurations with matched products from the same trusted brand.
Technical Performance
The Etronix Li-Po Saver 3-Cell operates on the principle of voltage monitoring and visual indication, making it a passive safety device that works with any 3-cell Li-Po battery pack regardless of capacity, brand, or discharge rate. The integrated LED light is engineered to activate and warn you when your 3-cell battery is approaching over-discharge conditions—typically when cell voltage drops below safe operational thresholds. The device is designed to be lightweight and compact, making it easy to keep in your RC kit bag or attach near your charging station for convenient monitoring. As a safety device, the Li-Po Saver performs no active charging or discharging functions; rather, it serves as an intelligent watchdog that helps you make better decisions about when to stop using your battery pack. This makes it compatible with all types of 3-cell Li-Po packs used in RC applications, from high-capacity packs in large RC trucks to smaller packs in compact RC cars. The build quality reflects Etronix's reputation for reliable RC electronics and accessories, ensuring that the LED indicator will function consistently across countless charge and discharge cycles.
What's in the Box
- Etronix Li-Po Saver 3-Cell device with integrated LED light
Frequently Asked Questions
- What does the Etronix Li-Po Saver 3-Cell actually do? — The device monitors your 3-cell Li-Po battery during use and provides an LED light warning when your battery is experiencing over-usage and approaching dangerous discharge levels. This visual alert system helps you stop using the battery before permanent damage occurs, which extends the overall life of your expensive Li-Po packs.
- Why is it important to prevent Li-Po over-discharge? — Lithium polymer batteries are sensitive to over-discharge, which occurs when the cell voltage drops too low. Over-discharging can cause permanent internal damage, dramatically reduce battery capacity, create safety hazards, and make the battery unusable. The Etronix Li-Po Saver helps you avoid this by warning you before it happens.
- Is the Etronix Li-Po Saver 3-Cell suitable for beginners? — Absolutely. This is one of the simplest and most beginner-friendly battery protection devices available. There's no software to install, no configuration required, and no complicated setup. Simply use it alongside your 3-cell Li-Po battery and watch for the LED warning light—that's all there is to it.
- What's the difference between the 2-cell, 3-cell, and 4-cell versions? — Each version is calibrated for a different number of cells in your Li-Po battery pack. The 3-cell version (ET0551) is designed specifically for 3S Li-Po batteries and will give you accurate voltage monitoring only for 3-cell packs. If you have 2-cell or 4-cell batteries, you should use the corresponding 2-cell or 4-cell saver for proper functionality.
- Can I use the 3-cell version with different capacity 3-cell batteries? — Yes. The Li-Po Saver 3-Cell works with any 3-cell Li-Po battery regardless of capacity (1000mAh, 2200mAh, 5000mAh, etc.). The device monitors cell voltage, not capacity, so it functions correctly across different sized 3S battery packs.
- How does the LED light work? — The integrated LED provides a visual warning when your 3-cell battery is approaching over-discharge conditions. Simply watch for the light activation during your RC sessions as an indicator that you should stop using the battery and charge it before damage occurs.
- Is this device compatible with all brands of 3-cell Li-Po batteries? — Yes. The Etronix Li-Po Saver 3-Cell is designed to work with any quality 3-cell Li-Po battery pack from any manufacturer, making it a universal solution for 3S battery protection across your entire RC fleet.
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 Etronix Li-Po Saver 3-Cell ET0551 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: Etronix
- Product Code: ET0551
- Barcode: 5055323932885
- Cell Configuration: 3-cell Li-Po
- Type: LED Warning Device
- Function: Battery over-discharge warning with LED light indicator
- Available Variants: 2-cell, 3-cell, and 4-cell versions
- Compatibility: 3-cell (3S) Li-Po battery packs of any capacity
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.
