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Battery case & magnetic battery pack guidesArticles from the factory floor

Measured numbers, buying advice and sourcing guides for iPhone battery cases and magnetic battery packs — written by the people who build them.

Explainer

Semi-solid-state power banks: what they are and whether they are safer

How the gel electrolyte works, what it improves, what it does not, and what buyers and retailers should check.

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Troubleshooting

Magnetic power bank not charging or charging slowly? Nine fixes

Alignment, case thickness, heat, the iPhone's own charging limits, cables and the pack itself, checked in the right order.

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B2B guide

How to test a power bank's real capacity, and spot fake mAh

The USB meter method, normal results, the maths behind mAh and Wh, and the warning signs of an overstated rating.

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Travel guide

Power bank and battery case on a plane: the 2026 rules

The 100 Wh limit, ICAO's two-per-passenger rule, airlines that ban in-flight use, China's 3C mark and how battery cases are treated.

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Explainer

Does a battery case damage your iPhone battery?

What really ages a phone battery, what Apple says about heat and charge cycles, and a simple routine for using a charging case.

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B2B guide

Battery case and power bank certifications: what importers really need

UN 38.3, IEC 62133, UL 2056, FCC, CE under RED, RoHS and Amazon's requirements explained, market by market.

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Buying guide

iPhone 17 battery case buying guide: how to choose for 17, 17 Pro and 17 Pro Max

Phone battery sizes, rated versus measured capacity, real charge per model, fit, weight, heat and the documents worth asking for.

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Buying guide

Magnetic battery pack buying guide: Qi2, capacity, heat and what really matters

What Qi2 25W means, how much a 5,000 or 10,000 mAh magnetic battery pack really adds, and how to avoid heat and weak magnets.

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B2B guide

Private label battery case: how to launch your own brand with an OEM factory

Product mix, budget, branding, compliance by market and a realistic timeline for your first private label order.

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Buying guide

Magnetic battery pack vs battery case: which one should your iPhone carry?

Capacity, real charge added, weight, thickness and price compared with measured numbers — and a simple rule for choosing.

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Explainer

How much does a 2500 mAh battery case really charge an iPhone?

mAh versus Wh, conversion losses and the wireless coil — why the number on the box is not the number in the phone.

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B2B guide

Battery case wholesale from China: MOQ, certificates and shipping

A buyer's checklist for sourcing battery cases and magnetic battery packs: factory checks, price tiers, documents and logistics.

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