... high quality and competitive price 1. 4v 0.4ah valve regulated sealed lead-acid storage battery2. high quality3. the rate of ... service life7.wide operating temperature range8. never leakage of acid,9. lead acid battery for desk lamp, lighting, toy, mini-speaker, flashlight ... questions, please let us know12. note: battery should be kept clean and put in the dry place 4V0.4AH sealed lead acid battery