Shallow charging and shallow discharging in lithium batteries refers to the practice of not fully charging or discharging the battery during the charge-discharge cycle, in order to extend its lifespan and improve charging efficiency. During charging, if the battery is fully charged, lithium ions continue to embed into the cathode material, which can cause expansion and deformation of the cathode, shortening the battery’s lifespan. During discharging, if the battery is fully drained, the lithium ions in the anode material are fully extracted, which can lead to lithium ion accumulation and the formation of lithium metal, further reducing the battery lifespan.

Some Jackery Portable Power Stations allow users to set shallow charging (charging to 85%) and shallow discharging (discharging to 15%) via the Jackery app.

Advantages: This method extends the battery’s lifespan, prevents over-discharging and over-charging, effectively protects the battery from damage, and prolongs the overall life of the lithium battery. Additionally, shallow charging and shallow discharging reduce the depth of cycling, significantly extending cycle life. If the battery is maintained within a 15%–85% charge-discharge range, its cycle life can be extended by approximately 30%.