Frequently Asked Questions — USB Charge Limiter Help

Chargie is a hardware USB charge limiter that stops charging at any percentage you set (20-100%). Plug Chargie between your charger and device, set your limit in the app, and it automatically stops charging at your target level — even when your phone is off.

Yes! Chargie maintains full USB data passthrough while limiting charge. Use Android Auto navigation, stream music, and mirror your screen — all while keeping your battery at a safe level instead of constantly charging to 100% in a hot car.

Yes, Chargie works with wired CarPlay. The USB data passthrough maintains your CarPlay connection while protecting your battery. Set your limit to 70-80% and use CarPlay without battery degradation.

Chargie for Laptops is a universal hardware solution that works with ANY USB-C laptop. Unlike OEM software (Lenovo Vantage, Dell Power Manager, MyASUS) that only works on specific brands, Chargie works at the hardware level — no software dependencies, works even when your laptop is off.

Windows 11 doesn't have a built-in battery charge limiter. You need OEM software (like Lenovo Vantage) or a hardware solution. Chargie for Laptops is the only universal hardware option — works with any USB-C laptop, supports up to 100W, and doesn't require software.

Chargie is an external USB accessory between the charger and charging cable; it does not modify the device hardware. For warranty terms and coverage, check with your device manufacturer.

Connect a compatible Chargie USB device between the power adapter and wireless charging pad. Check the Chargie model and charging-pad power requirements before choosing your setup.

On iPhone, go to Settings → Battery → Battery Health & Charging — it shows your maximum capacity percentage. On Samsung, go to Settings → Battery → Battery Health. On Pixel, check Settings → Battery → Battery Health. Most phones show battery health natively starting from Android 14. For laptops, use the Chargie app's real-time power monitoring, or check your OS battery report (Windows: powercfg /batteryreport, macOS: Option-click the battery icon).

Optimized Battery Charging is a software feature (available on iPhone, Samsung, and Pixel) that learns your routine and delays charging past 80% until you need it. However, it only works when your usage pattern is predictable, it varies by manufacturer, and you can't set a precise limit. Chargie is a hardware solution that physically cuts power at your exact chosen percentage — it works with every device, every OS, and gives you full control including features like overnight scheduling and temperature protection that built-in solutions lack.

No. Lithium-ion battery degradation is a chemical process that cannot be reversed. Once capacity is lost, it's permanent — no app, calibration trick, or software update can restore it. That's why prevention matters: limiting charge to 80% and avoiding heat can slow degradation dramatically, keeping your battery healthy for 3–4 years instead of 1–2. Chargie is a preventive tool, not a repair tool.

Heat during charging comes from electrical resistance as current flows into the battery, and from the chemical reactions inside the cells. Fast chargers push more current, generating more heat. Using your phone while charging adds the processor's heat on top. According to Battery University, temperatures above 30°C accelerate battery aging. Chargie's overtemperature protection feature pauses charging when your phone exceeds your set temperature threshold.

Fast charging generates significantly more heat than standard charging, and heat is a primary cause of battery degradation. Research from Frontiers in Energy Research shows that high-power charging can cause 15–25% faster capacity loss. That said, occasional fast charging is fine — the real damage comes from doing it every day combined with charging to 100%. Using Chargie with a fast charger lets you get the speed benefit while capping the charge level.

Yes, we ship worldwide from our warehouse in China with duties and taxes prepaid (DDP) — so you won't pay anything extra on receipt. Free shipping applies automatically on qualifying orders (minimum order amount varies by destination). Standard delivery typically takes 5–12 business days depending on your location. Tracking is provided for every order.

Chargie A (USB-A) is for phones and tablets that charge via USB-A cables — most common for older devices and wireless charging pads. Chargie C Basic (USB-C, low power) is for phones and tablets with USB-C charging. Chargie C for Laptops (USB-C, 100W PD) is for laptops and high-power USB-C devices. Not sure? Use our Which Chargie Do I Need? guide.

Yes. One Chargie can be used with as many devices as you like — just plug in a different phone or tablet whenever you need to. The app supports multiple device profiles with different charge limits. However, Chargie can only charge one device at a time. For charging multiple devices simultaneously, you'd need one Chargie per device.

Yes, Chargie works with every Samsung Galaxy phone — including the S series, A series, Note series, and Z Fold/Flip. For older Galaxy models with USB-A cables, use Chargie A. For newer Galaxy models with USB-C, use Chargie C Basic. Samsung's built-in "Protect Battery" mode only caps at 85% with no scheduling — Chargie lets you set any limit from 20–100% with overnight scheduling and temperature protection.

Yes. Chargie works with iPads, Samsung tablets, Amazon Fire tablets, and any other tablet that charges via USB. Use Chargie A for tablets with Lightning or USB-A charging, or Chargie C for USB-C tablets. Especially useful for tablets used as kiosk displays, smart home controllers, or children's devices that stay plugged in 24/7.

Chargie is a hardware device that sits between your charger and your phone's cable. It controls power flow physically — by opening and closing a relay switch inside the device. The app communicates with Chargie via Bluetooth to set your preferences, but the actual charge limiting happens in the hardware. No root, no jailbreak, no system-level access required. This also means it works with devices that have no smart OS at all — like cameras, drones, or power banks.

Just set Chargie to 100% in the app — it will charge your phone fully like any normal charger. You can also use the overnight scheduler: keep your phone at 50–70% through the night, then set it to top up to 100% just before you wake up. When you're back home, switch back to 80% for daily protection. It takes about 3 seconds to change the limit.

Virtually none. When no device is connected, Chargie's Bluetooth module draws less than 0.1W — negligible on your electricity bill. When a device is connected and charging is paused (limit reached), Chargie keeps the relay open and draws minimal standby power.

Yes, that's exactly how it's designed to be used. Chargie includes overcurrent protection, overvoltage protection, and overtemperature monitoring. Thousands of customers leave their Chargies plugged in permanently. The device has no battery of its own and generates negligible heat. In fact, leaving Chargie plugged in is safer than leaving your phone charging without it — because Chargie prevents the high-voltage stress and heat that cause battery swelling and fire risk.

Chargie is designed and engineered in Timișoara, Romania (EU) by Ovidiu Sandru, founder of Lighty Electronics. The PCBs are manufactured with gold-plated traces for durability, and final assembly and quality control happen in-house. Chargie has been shipping worldwide since 2019, with over 60,000 units sold to customers in 80+ countries.