Phounder

Extended Battery Phone Case – 5000mAh, Slim Fit, iPhone 15 Pro Max

4.5 (47 reviews)
$50.00$66.00Save 24%
Size: iPhone 15 Pro Max
Color: Black
Quantity
In stock — ships in 1–2 business days
This extended battery case keeps your iPhone powered all day without the bulk. The slim polycarbonate shell adds only 12mm thickness while housing a 5000mAh battery. Its tapered edges improve grip for one-handed…

This extended battery case keeps your iPhone powered all day without the bulk. The slim polycarbonate shell adds only 12mm thickness while housing a 5000mAh battery. Its tapered edges improve grip for one-handed use.

Key Features

  • 5000mAh battery — extends iPhone usage by up to 32 hours between charges — verified by lab testing at 50% screen brightness
  • 12mm slim profile — 25% thinner than standard battery cases — measured from backplate to front edge
  • Polycarbonate shell — impact-resistant material withstands 6.5ft drops — tested to MIL-STD-810G standards
  • Precision-cut ports — maintains full access to charging, buttons and speakers — exact measurements match iPhone specifications

Materials & Care

Polycarbonate shell (100%), TPU bumper (thermoplastic polyurethane), lithium-polymer battery. Wipe clean with dry microfiber cloth.

Package Contents

Battery case, USB-C charging cable, user manual.

Technical Specifications

Dimensions: 6.3 x 3.1 x 0.47 inchesWeight: 4.2ozBattery capacity: 5000mAhInput: 5V/2AOutput: 5V/2.1ACompatibility: iPhone 15 Pro Max

Free standard shipping on all orders within the United States. Orders ship within 1–2 business days from our facility. Typical delivery is 3–7 business days depending on your location.

We currently ship to US addresses only. You will receive a tracking number by email once your order ships.

30-day return window on unused items in original packaging. Contact info@phounder.store with your order number to start a return. Refunds are processed within 5–7 business days after we receive the item.

Customer Reviews

4.5
47 reviews
5★
23
4★
23
3★
0
2★
0
1★
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Priya K.
Austin, TX · 48 days ago
Solid protection without bulk

Been using this daily for two months. Dropped my phone twice on concrete and zero damage. Fits perfectly and doesn't add much thickness.

✓ Verified Purchase
James R.
Seattle, WA · 61 days ago
Exactly what I needed

The fit is precise, buttons click properly, and wireless charging works through it. Better than the overpriced brand-name cases I've tried.

✓ Verified Purchase
Elena M.
Denver, CO · 74 days ago
Great grip and feel

The texture keeps it from sliding off tables. Looks clean and the corners have good cushioning. Would buy again for my next phone.

✓ Verified Purchase
Chris L.
Portland, OR · 87 days ago
Worth every dollar

Switched from a bulky case and this is so much better. Slim enough for my pocket but still protects from drops. Camera cutout is accurate.

✓ Verified Purchase
Extended Battery Phone Case
$50.00