Bought a USB to DC charging cable and not sure which voltage your device actually needs? Getting it wrong isn't just a case of "it won't work" — too much voltage can permanently damage your device. Here's a plain breakdown of what 5V, 8.6V, 9V, 12V and 12.6V are each used for, and one important thing this cable cannot do.
- Voltage Standards: Standard USB-A delivers 5V DC. Devices requiring 9V or 12V need a stepped-up booster cable or dedicated DC adapter barrel.
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Check Device Label: Always inspect your device's power input rating (marked as
DC IN 5V,9V, or12V) before connecting. Over-voltage will permanently fry 5V electronics. - Common Barrel Sizes: The standard Singapore Wi-Fi router, TV box, and LED strip barrel is 5.5mm x 2.1mm.
- Universal 8-in-1 Solution: Multi-tip sets include interchangeable tips for 5.5x2.5mm, 4.0x1.7mm, 3.5x1.35mm, and Micro-USB/Type-C connectors.
What each voltage is actually used for
| Voltage | Typical devices | Notes |
|---|---|---|
| 5V | Small LED strips, Bluetooth speakers, humidifiers, smart plugs, some routers | Passed straight through from the USB source, no boosting |
| 8.6V | Certain cordless phone bases and specific router/modem models with a non-standard voltage rating | Less common — check your device's label carefully before using this option |
| 9V | Home routers and modems, CCTV cameras, many Wi-Fi security cameras including Tapo models, guitar effects pedals, some doorbell cameras | One of the most commonly needed voltages for home networking and camera gear |
| 12V | CCTV DVRs/NVRs, larger LED strip lighting runs, some routers, small fans, external monitor power | Common for equipment that draws more current than 9V devices |
| 12.6V | Specific charging docks and battery packs rated just above the standard 12V line | Check your device's exact rated voltage — 12V and 12.6V are not interchangeable |
Can this cable charge a laptop?
No. Laptops typically need 15V to 20V at much higher wattage, usually delivered through USB-C Power Delivery or a proprietary barrel charger built for that power level. This cable boosts voltage from a USB source, but it cannot supply the current a laptop draws, and using it on a laptop simply will not power the machine. This set is built for low-power DC devices like cameras, routers and LED lighting, not laptop charging.
Can it power a Tapo camera?
Yes. Most plug-in Tapo cameras, including the C210 and similar models, run on 9V DC, which this cable set covers directly. Two things matter for a stable connection: use a USB power source rated at least 5V/2A (avoid basic 0.5A or 1A ports, which often aren't enough during pan, tilt or night-vision activation), and match one of the 8 included barrel tips to your camera's plug size.
Matching the barrel tip
Voltage is only half the equation — the physical plug also needs to fit. This set includes 8 interchangeable tips covering the sizes most low-voltage DC devices use: 6.3×4.0, 6.0×3.0, 5.5×2.1, 5.5×1.7, 4.8×1.7, 4.0×1.7, 3.5×1.35, and 2.5×0.7 (outer × inner, in mm). If you're not sure which one you need, measuring your original plug or sending us a photo works just as well.
A quick safety note
Always check the voltage printed on your device or its original adapter before picking an output. Supplying more voltage than a device is rated for can damage it permanently, and going the other way (too little voltage) usually just means it won't power on. When in doubt, match the exact number rather than rounding to the nearest option.
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FAQ
What voltage does my router need?
Most home routers use 9V or 12V. Check the label on the underside of the router or on its original power adapter to confirm.
Can I use this cable with a power bank?
Yes — any USB power source works, including power banks. For the boosted voltage options (8.6V–12.6V), make sure the power bank can supply enough current at that voltage.
Will this charge my laptop?
No. Laptops need far more power than this cable can deliver, typically 15V–20V through USB-C PD or a dedicated laptop charger.
Is this compatible with Tapo cameras?
Yes, for models that run on 9V DC, such as the Tapo C210. Use a 5V/2A or better USB power source for stable performance.
What if I pick the wrong voltage?
Too much voltage can damage your device, so always confirm the rating printed on the device or its original adapter first. If you're unsure, message us and we'll help you check.
🇸🇬 Get the right voltage: Shop the 8-in-1 USB to DC Charging Cable Set here — choose 5V, 8.6V, 9V, 12V or 12.6V, with 8 interchangeable barrel tips included.
Browse more accessories: Shop our Electronics & Accessories Singapore collection for more cables, adapters and USB accessories.