when it comes to laptop - desktop batteries - the travelmate 4000 acer replacement battery provides the power you need when you need it. the travelmate 4000 is made from the ground-up with first-rate materials. also it has been developed to meet or out-perform acer's original specifications. thanks for choosing batterytex for your battery needs. save time, money and hassle and get your batteries at unbeatable prices at batterytex.com. have questions on this product or want to buy bulk? call our techs now at 1-888-825-6661. batterytex carries more of these great laptop - desktop batteries batteries. view them here now! browse other terrific products by manufacturer: acer batteries should be built with the best components and should be highly rated in terms of quality and efficiency. for battery warranty information please call or email us. our standard manufacturer warranty is one-year however some may offer different periods.