A pair of 60cm magnetic USB-A cables for watches that run the FitCloudPro app: one Model A and one Model B head with opposite polarity, so at least one charges your watch.
Two-pin magnetic chargers have a catch that trips up many owners: the positive and negative pins can sit either way round. A cable with the right spacing but the wrong polarity snaps on neatly and then does nothing, and the watch slowly drains while you wonder why.
This FitCloudPro pack solves that by including both options. The Model A and Model B heads carry opposite polarity, so one of the two will match your watch. Try the first; if the charging icon does not appear within a few seconds, try the second.
A quick way to tell which is which after the first charge:
The spacing here is 2.84mm between the centres of the two pins. Measure the two dots on the back of your watch with a millimetre ruler, centre to centre, before ordering. A reading near 2.8mm is a match; a reading near 4mm or 7.6mm needs a different cable.
Why this matters for your routine: a watch that will not charge is a watch that is not on your wrist. Sleep logs go blank, the step streak ends, and the motivation that comes from seeing the weekly chart fade goes with it. Getting the charger right is the least glamorous part of a fitness habit, and one of the most important.
The charger guide covers the common pin sizes across FitPro-style watches.
| Spec | Value |
|---|---|
| Connector | 2-pin magnetic head |
| Pin pitch | 2.84mm centre to centre |
| Polarity | Model A and Model B, reversed relative to each other |
| Pack | 2 cables, one of each model |
| Cable length | 60cm |
| Plug | USB Type-A |
| Contacts | Pure copper probes with magnetic hold |
| Protection | Short-circuit, over-voltage and over-current |
| Standby | Low-power standby circuit |
| Certification | CE, RoHS |
| Colours | Black and white |
| Made for | Smart watches that use the FitCloudPro app |
| Part number | SMC-TY28HB-02 |
| Maker | Xininyia |
FitCloudPro is the companion app for a whole group of budget watches and trackers from different brands. Those watches share the app, but not always the same charging hardware, so the app name alone is a starting point rather than a guarantee.
Several watches that pair with FitCloudPro include:
Check each one the same way:
Measuring such a small gap is easier with a little help. Photograph the back of the watch next to a ruler, zoom in on the phone, and read the distance between the two dot centres from the picture. It is far more accurate than squinting at the watch itself.
Chargers with the same 2.84mm spacing are also used by ID205L-style watches, which is why the head looks familiar if you have owned one before. The polarity pair is what sets this pack apart.
| Measured gap | Next step |
|---|---|
| About 2.8mm | This pack; test both heads |
| About 4mm | A 4mm universal cable |
| About 7.6mm | A 7.62mm 2-pack |
| About 2.5mm | A 2.5mm 2-pack |
Setting up the app itself, including account and pairing fixes, is covered in the app guide.
Each cable is 60cm long, a deliberately short length. It suits a laptop port, a power bank or a USB adapter on a desk, and it coils up small enough for a gym bag pocket.
Plan the charging spot around that length:
For a floor-level wall socket and a bedside table, a short USB extension or a taller charging spot keeps the watch from dangling. Magnetic heads let go if the cable is tugged, which protects the watch but can interrupt a charge overnight.
The plug is USB-A, the classic rectangular type. Any phone-style adapter, laptop port or power bank with a USB-A socket works. A small, low-power adapter is fine; a watch battery does not benefit from a big fast-charger brick.
Protection circuits guard against short circuits, over-voltage and over-current, and the cable carries CE and RoHS marks. The pins are pure copper, which conducts well but benefits from a clean surface. Wipe the watch's contacts after sweaty sessions and clean both ends weekly with a cotton bud and a drop of isopropyl alcohol.
If neither head charges after cleaning and a port swap, the problem may be the watch rather than the cable. The not-turning-on guide works through battery and reset fixes in order.
The FitCloudPro pack is the right buy when you know the spacing is 2.84mm but not the polarity. If either of those is different for your watch, another cable will do the job better.
Pick this pack for any FitCloudPro watch where you are unsure of the polarity. Choose the Acediar 2.84mm pack when you already know an ID205L-style cable works and want the longer reach.
A short checklist before ordering:
Spare cables are the cheapest insurance a watch owner can buy. With two heads in the box, a lost charger no longer means a week of blank sleep data and a broken step streak.
Households with more than one FitCloudPro watch can get extra value here. If the second watch turns out to need the opposite polarity, the other head becomes its own charger, so label each one once you know.
Keep the spare somewhere memorable, such as with the passport or in the gym bag's side pocket. The day the main cable goes missing, the backup is already where you need it.
For strap swaps and other spares, the bands and spares guide has the sizes.
The two heads have opposite polarity. Budget watches wire their charging dots either way round, so one of the two will charge yours.
2.84mm, measured from the centre of one charging dot to the centre of the other.
Each cable is 60cm, with a USB-A plug.
Only those with 2.84mm contacts. FitCloudPro watches come from several brands, so measure the pin gap first.