Insert battery pack 36V 4,0Ah Had only played with the idea of me this battery to buy here. But according to manufacturer Bosch should be without this protection and charge control. Item number 16 .......... The picture shows a with LZA on the home page. The product image shows the underside of the battery. You can not see it. HD, 4.0 Ah, Li Ion 36 V slide-in battery pack with ECP (electronic cell protection) and LTA (charge level indicator) have for my records an article number 26 ......... Please maybe adjust info here. Until clarification I would rated this battery only with 3 stars. A charge status indicator and cell protection should be.