Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to lengthen rc battery life [title] Wait at least 15-20 minutes after you drain a battery to charge it. [step] This allows the battery to cool down before each charge cycle. [substeps] Make sure the battery is cool to the touch before charging it again, but 15 minutes should be alright.

Ending1: [title] Recharge the battery one last time. [step] Make sure it's hot to warm to touch before charging it again. Ending2: [title] Plug the rc battery in to the dishwasher. [step] Throw it a couple hundred meter safe, flat area. Ending3: [title] Know what is considered hot for a battery. [step] If the battery is hot after use, then it is a good sign that your battery is getting old. Ending4: [title] Most people lose their rc battery within twenty minutes of doing anything difficult or drastic that requires them to disconnect it from the power source. [step] This can happen even after the battery is simply removed from the power source.

Answer format: ending1/ending2/ending3/ending4