Auto Stop Charging Adapter
Auto Stop Charging Adapter
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Auto Stop Charging Adapter
Your battery isn't dying from use — it's dying while you sleep
You plug in at 11. Your phone hits 100% by around 1 a.m. — then sits at a full charge for six, seven, eight hours until your alarm. Every night.
Lithium-ion batteries wear faster when they're held at a full 100%, even while the phone just lies there. Battery specialists call it calendar aging — and it's why Apple and Samsung built 80% charge limits in the first place.
The problem was never how you use your phone. It's the hours it spends parked at 100% overnight. ChargeGuard ends that hold — automatically, with nothing for you to manage.
Three seconds to set up. Then never think about it again.
Plug it in-line
Sit ChargeGuard between your charger cable and your phone. That's the whole setup — no app, no account, no pairing.
It senses when you're full
It watches the charging current and detects the moment your battery reaches a full charge.
It stops the power
A real, physical cut-off — not a software request that might not fire. Your battery stops sitting at 100% all night.
The free options don't reliably work — or aren't on your phone
| ChargeGuard | Phone's "optimized" charging | 80% limit toggle | App-based limiter | |
|---|---|---|---|---|
| Works on any phone | ✓ | partial | iPhone 15+ / some | ✓ |
| Reliable physical cut-off | ✓ | black box | ✓ | app-dependent |
| No app / no Bluetooth | ✓ | ✓ | ✓ | ✕ |
| Full-speed charging | ✓ 140W | ✓ | ✓ | can throttle |
| Nothing to babysit | ✓ | may not engage | ✓ | ✕ |
Apple's optimized charging needs ~14 days to learn your routine, Location Services on, and a predictable schedule — and won't engage when you travel. The clean 80% toggle isn't on most phones at all. ChargeGuard just works, every night, on any of them.
Simple on the outside. Serious on the inside.
Physical auto-stop
Current-sensing mechanical cut-off the instant your phone is full.
No app, no Bluetooth
Nothing to install, pair, or keep synced. Plug in and forget it.
140W full speed
PD 3.1, QC 5.0 & PPS supported — charges at full speed until cut-off.
Universal USB-C
iPhone 15+, Samsung, Pixel, tablets, power banks — one adapter.
Certified & flame-retardant
CE / FCC / RoHS certified, molded from flame-retardant PC.
Press-to-reset
Need a full 100% before a long day? A quick press or re-plug starts a fresh charge.
The details
Verified buyers who stopped watching the number
A lifesaver for my battery
"I used to see a noticeable drop in health every few months — this has really helped stabilize it."
Made for overnight charging
"As someone who charges devices overnight a lot, this is a must-have. The physical disconnect works seamlessly."
Works on every device we own
"I use it with my iPhone, my wife's Android, and our shared tablet without any issue."
60-Day After-Sales Guarantee
Try ChargeGuard on your own nightstand. If you don't love plugging in without a second thought, contact us within 60 days for a full refund. No forms. No hassle. No risk — and shipping's on us.
Everything you're wondering
No. It acts as a full-speed bridge supporting up to 140W (PD 3.1, QC 5.0, PPS), so your device charges at its normal rated speed right up until it reaches 100% and the adapter cuts off.
Yes, as long as it uses a standard USB-C port — iPhone 15 and newer, Samsung Galaxy, Google Pixel, OnePlus, tablets, even power banks. One adapter carries over to your next phone too.
That software is a black box you can't fully count on. By Apple's own description it needs ~14 days to learn your routine, Location Services on, and a predictable schedule — and won't engage when you travel. The cleaner 80% limit isn't on most phones at all. ChargeGuard is a reliable physical cut-off that works on any phone, every night.
It senses when the charging current drops — the signal that your battery is full — and then physically cuts the power. A real mechanical stop, not a software request.
It works by cutting power when you're full rather than forcing more current into your phone, so it isn't running hot the way a charger does overnight. It's CE / FCC / RoHS certified and molded from flame-retardant PC.
None. There's no app, no account, and no Bluetooth to pair. You plug it in once and it works on its own.
Easy — a quick press-to-reset (or re-plugging the cable) starts a fresh charge whenever you need every percent before a long day.
Because the free options either don't reliably engage or aren't available on your phone — and $49 to protect a phone worth far more (and dodge an early upgrade) is an easy call. It's backed by a 60-day guarantee, so there's no risk in trying it.
Plug it in tonight. Stop thinking about it.
Give your battery back the one thing the rules and the software never could: a night that doesn't end at a full 100%.