Portable batteries are easy to share in theory and awkward to share in practice. If someone else needs your power bank, you usually have to hand over the entire battery, give up the cable attached to it, or stay nearby while two devices share the same charger.
Price: $79.95
Where to Buy: Apple
The Nimble SharePower Portable Battery Charger takes a more literal approach to sharing. Its 10,000mAh capacity is divided between two magnetically connected 5,000mAh battery modules. Pull them apart and each becomes an independent USB-C power bank. Snap them together and they function as one larger charger. Apple currently sells SharePower for $79.95.
The practical appeal isn’t simply having another 10,000mAh battery. It’s being able to lend half of it without giving the whole thing away.
One Power Bank Becomes Two
SharePower operates in two configurations.
In Stack Mode, the two 5,000mAh modules connect magnetically to provide the full 10,000mAh capacity. Nimble rates the assembled battery for up to 35W of total USB-C PD output when charging three devices simultaneously. That’s combined output rather than 35W charging to a single device; Nimble’s specifications list single-device output at up to 20W.
Separate the modules and they switch to Share Mode. Each 5,000mAh half can then provide up to 20W USB-C PD independently. That’s the feature that changes how the battery is used.
If two people are traveling together and both phones are running low, one person can take a module and walk away with it. Couples, families, coworkers, or anyone who regularly carries backup power for somebody else can divide the available capacity instead of deciding who keeps the charger.
There’s an obvious tradeoff. Split SharePower and each person has 5,000mAh rather than access to the complete 10,000mAh reserve.
Nimble estimates that the full battery provides roughly 1.5 to two phone charges, depending on the device. That’s a manufacturer estimate rather than independently measured endurance.
The Cables Are Built Into the Design
A power bank doesn’t help much if the cable you need is sitting at home.
The primary SharePower module has a foldaway USB-C connector that plugs directly into a compatible device. The secondary module has an integrated fabric USB-C cable that doubles as a carrying strap. Each module also has an additional USB-C port.
In Stack Mode, SharePower can charge up to three devices simultaneously. Nimble says its three-device configuration uses the foldaway connector, built-in cable, and an extra USB-C port. A separate 0.75-meter USB-C-to-USB-C cable is included in the box for situations where you need the additional port.
For travelers, the split-battery concept therefore doubles as a way to reduce dependence on loose charging cables for everyday use.
The Two Halves Keep Track of Their Charge
Battery indicators become more important when one battery can turn into two.
Apple specifies a dynamic mode-switching TFT LCD display on the primary module, while the secondary module uses LED indicators. Nimble describes the primary unit more generally as an LED power display. Either way, both modules provide battery-status information when separated. There’s another useful feature when they come back together.
WIRED reports that SharePower balances the charge between its two modules after they’re reconnected. Nimble cofounder and CEO Ross Howe explained that if one half has been used more heavily, the more charged module can share power with the depleted one so the two sides equalize.
That’s independent reporting rather than a feature detailed on Apple’s specification sheet, and it addresses an obvious practical problem with a battery designed to be divided repeatedly. Lending the same module doesn’t necessarily mean you’re stuck with one full half and one nearly empty half afterward.
35W Doesn’t Mean 35W to Your Phone
The power specifications deserve some clarification.
Each separated module supports up to 20W USB-C Power Delivery. Nimble’s specifications also list single-device output at up to 20W. The headline 35W figure applies to total output when three devices are being charged in Stack Mode, rather than delivering 35W to one connected phone.
That’s enough for many phones, headphones, and smaller electronics, but SharePower isn’t designed to replace a high-output laptop power bank.
Nimble claims its 20W output can charge a compatible iPhone to around 50 percent in roughly 30 minutes. That’s Nimble’s estimate rather than an independent test result, and actual charging performance depends on the phone and charging conditions.
MacRumors did independently test SharePower and reported that both modules achieved their advertised charging speeds. It also found that a single 5,000mAh module couldn’t completely recharge an iPhone 17 Pro Max, while the combined 10,000mAh capacity could.
The evidence therefore supports the basic charging specifications, but SharePower’s real distinction remains how its capacity can be divided, not unusually high charging performance.
It’s Compact, but the Modular Design Is the Attraction
The assembled SharePower measures approximately 3.1 by 2.8 by 1 inch and weighs 7.6 ounces, or 216 grams.
Apple lists compatibility with recent iPhones, iPads, Apple Watches, and AirPods, while Nimble also lists Samsung Galaxy, Google Pixel, Android devices, tablets, wearables, Bluetooth speakers, and headphones. Apple Watch users will still need the appropriate USB-C charging accessory; SharePower doesn’t have an integrated Apple Watch charging puck.
Nimble also lists SharePower as TSA/airline approved. At approximately 37Wh, it’s well below the usual 100Wh threshold, although lithium-ion power banks belong in carry-on luggage rather than checked baggage.
Who Is the Nimble SharePower For?
SharePower makes the most sense for someone who regularly carries backup power for more than one person.
Couples traveling together, parents carrying power for children, coworkers at conferences, and friends spending long days away from outlets are obvious fits. Instead of deciding who gets the power bank, you can hand over one 5,000mAh module and keep the other.
It makes less sense if your priority is maximum capacity, the highest charging speed, or simply getting the cheapest 10,000mAh battery. At $79.95, you’re paying for the modular design, built-in connections, and ability to split one battery between two people rather than capacity alone.
Price: $79.95
Where to Buy: Apple
The bottom line
Most power banks are designed around one person carrying spare energy. SharePower treats that energy as something you might actually want to divide. The two detachable 5,000mAh modules won’t give you more total capacity, but the combination of independent charging, built-in USB-C connections, and verified load balancing could make that capacity considerably more useful when two people need power at the same time.
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