As others have mentioned, you don't need to be overly cautious with charging and discharging the Equinox cell based on the built-in protective circuits that preclude overcharging and over discharging the cell into areas where the cell can be damaged. Just top it off and leave it be. The only time you can get into real trouble is if you attempt to charge the battery on the fly in overly cold weather. The Equinox allows you to charge the battery on the fly while detecting by using a power bank or similar power source, presumably secured to your detector in some manner. If you decide to do this (I have never been in a situation where the Equinox battery depleted even during an all day hunt as long as I charged it the night before so I have not done "on the fly" charging) - be advised that you should not attempt charging a Li Ion battery when the ambient temperature is less than 32F. Permanent damage to the Li electrolyte can result, ruining the battery in the process. So don't charge the battery outside of the posed charge temperature range in the user guide. You can operate the Equinox at lower temperatures, you just should not be charging the battery under those conditions.