Quality
21 October 2026
"6 ft drop tested" is a marketing sentence, not a test result. A drop test is defined by six things: the height, the surface, the orientation, the number of drops, the number of units, and the pass criterion. Change any one and the number means something different.
The military standard most often cited is MIL-STD-810. Understanding what its drop method actually specifies explains why a 6 ft claim and a 4 ft claim can both be honest and not comparable.
MIL-STD-810, Method 516, Procedure IV covers transit drop: the item is dropped while packaged, or as a bare item in the "shall be tested in the manner in which it will be used" reading. The method specifies a drop surface of plywood over concrete, a defined sequence of orientations — corners, edges and faces — and a defined number of drops, and it defines failure as a loss of function or a breach of a stated criterion.
A drop test at a fixed height is dominated by how much energy the case can absorb and how far it can deflect before it cracks. Thicker walls absorb more, weigh more, and make the buttons worse. A 1.0 mm TPU shell and a 1.5 mm TPU shell are not the same product at different prices; the second is a different engineering answer.
TPU absorbs well and recovers. Polycarbonate is stiffer and transmits more to the phone but resists deformation. That is why the common rugged construction is a TPU liner inside a PC shell: the TPU deforms, the PC spreads the load. The material comparison goes through the trade-offs in more detail.
| Parameter | What to write down |
|---|---|
| Height | Measured from the lowest point of the case, not the drop table |
| Surface | Concrete with a steel plate, or plywood over concrete — named |
| Orientation | Which corners, edges and faces, in which order |
| Quantity | Number of units tested — one unit is an anecdote |
| Pass criterion | Case intact with no functional loss; phone undamaged stated separately |
| Conditioning | Temperature and humidity before the drop, if any |
Five units, three heights, a named surface, and a stated pass criterion is a test. "We dropped it from shoulder height and it was fine" is a demonstration.
If a claim matters to your listing copy, ask for the report before the claim goes live, and put the protocol summary in the marketing material. Buyers increasingly ask for it, and a stated protocol is more persuasive than a bigger number. "1.5 m, five units, six orientations, plywood over concrete, no functional loss" survives scrutiny; "military grade" does not.
Where we do not have a current report for a specific format, we say so rather than repeat a claim. That is a slower conversation at quotation stage and a much shorter one after a container lands.
No. It is a test method, not a pass standard and not a certification. What exists is a test report recorded against a specific method and procedure, for a specific sample.
There is no single standard. A pocket-height drop is around 1.0–1.5 m and most commercial cases are tested in that band. What matters is the stated protocol, not the headline number.
Corners first, then the camera cut-out ring, then the button cut-outs. Two-shot bond lines fail when the process temperature was wrong rather than because of the design.