Pin SLA nhựa đến từ các nhà cung cấp có ít hơn một tế bào bị từ chối bởi một số người mua kiểm tra pin trong quá trình kiểm soát chất lượng. Điện áp thấp cho thấy rằng pin có thể có một phần mềm ngắn, một khiếm khuyết không thể được sửa chữa với đi xe đạp. | Plastic SLA batteries arriving from vendors with less than per cell are rejected by some buyers who inspect the battery during quality control. Low voltage suggests that the battery may have a soft short a defect that cannot be corrected with cycling. Although cycling may increase the capacity of these batteries the extra cycles compromise the service life of the battery. Furthermore the time and equipment required to make the battery fully functional adds to operational costs. The Hawker cell can be stored at voltages as low as . However when reactivating the cells a higher than normal charge voltage may be required to convert the large sulfite crystals back to good active material. Caution When charging a lead acid battery with over-voltage current limiting must be applied once the battery starts to draw full current. Always set the current limit to the lowest practical setting and observe the battery voltage and temperature during the procedure. If the battery does not accept a normal charge after 24 hours under elevated voltage a return to normal condition is unlikely. The price of the Hawker cell is slightly higher than that of the plastic equivalent but lower than the NiCd. Also known as the Cyclone this cell is wound similar to a cylindrical NiCd. This construction improves the cell s stability and provides higher discharge currents when compared to the flat plate SLA. Because of its relatively low self-discharge Hawker cells are well suited for defibrillators that are used on standby mode. Lead acid batteries are preferred for UPS systems. During prolonged float charge a periodic topping charge also known as an equalizing charge is recommended to fully charge the plates and prevent sulfation. An equalizing charge raises the battery voltage for several hours to a voltage level above that specified by the manufacturer. Loss of electrolyte through elevated temperature may occur if the equalizing charge is not administered correctly. Because no .
