🔍 What changed
This is the first version of the article, so everything below was added.
A LiPo cell is happiest sitting at roughly **3.8V** (some chargers target 3.80–3.85V). Leaving a pack at a full 4.2V/cell, or draining it flat, stresses the chemistry and is what makes packs puff and lose punch over time.
**How to do it:** most modern chargers have a **Storage** mode that will either charge up or discharge down to about 3.8V per cell automatically. Use it whenever a pack won't be run within a day or two.
**Where to keep them:** cool and dry, out of direct sun, and in a LiPo-safe bag or a metal ammo can. Never store or charge a pack on carpet or near anything flammable.
**The hard limits:** don't charge a cell above 4.2V, and don't pull it below about 3.0V under load — most ESCs have a low-voltage cutoff to protect the pack, so leave it switched on. A puffed, hot, or damaged pack should be retired, not run.