LiPo batteries for GPS trackers
A GPS tracker lives or dies on standby time in a small housing. This page explains the size and runtime trade-off, anchored by the 803040 listing that names GPS among its applications.
Dimension-callout pouch outline — the site's recurring diagram motif. It is a schematic, not a photograph of a product, factory or customer project.
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A tracker spends most of its life asleep, waking to fix position and transmit. That pattern makes average current low but peak current — during transmission — high, and it makes standby time sensitive to self-discharge and to the device's sleep design as much as to raw capacity. A buyer who sizes a tracker battery on capacity alone, without the device's average and peak currents, will usually misjudge runtime in one direction or the other.
The 803040 listing cited here states 3.7 V, 1000 mAh, 8.0 x 30 x 40 mm, a 300-times cycle life, and applications including GPS, with a minimum order of 1 piece, an enquiry range of $1.10–1.50 and a 7-day lead time for that listing. Those values describe that listing only; another 803040 listing states 450 mAh with different terms. For a tracker inquiry, quote the 1000 mAh listing explicitly if it is the one you mean, and state the tracker's size budget alongside it.
Trackers also face temperature and vibration in vehicles and field use, and a tracker that lives outdoors needs its operating range confirmed for the exact model. State the tracker's housing size, its reporting interval, its peak transmit current and its operating environment, and the battery choice becomes a calculation rather than a guess.