quality

Refill

Free replenishment when delivered units drop.

Why it matters

'Refill 30D' means the panel will top you back up to the ordered amount within 30 days. 'Lifetime refill' is mostly a marketing line — read the terms before believing it.

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Refill terms checker

Related terms

Non-drop

Delivered units that don't disappear over time.

Drop rate

Percentage of delivered units lost over a window.

Guarantee

Panel's written promise on quality or refill.