This TOSHIBA Pocket PC e400 Series Replacement Battery is 100% compatable with the L423467-E4 TOSHIBA Pocket PC e400 Series Replacement Battery. Our batteries and accessories are made with high quality parts and are guaranteed to meet or exceed the original equipment manufacturers specifications at a reduced price. All batteries are tested for 100% quality control assurance. This TOSHIBA Pocket PC e400 Series Replacement Battery includes a warranty to guarantee that it has no manufacturing defects.