Maintenance-free lead-acid valve regulated the NP series Special Features: • Valve-regulated design• Electrolyte bound in the glass fiber• Maintenance free operation• Corrosion-resistant high-capacity grid plates with lead-tin-calcium alloy• Excellent high current performance• Operating temperature range Next• Very good charging efficiency• Long life with low self-discharge, 3% per month at 20 ° C General Features: • NP batteries can be operated continuously in a lateral position• Standard housing (ABS), flame retardant according to UL 94 HB• Impact plastic housing and Bruchgfestes• Manufactured under ISO 9002 and ISO 14001 Environmental Management Standard• Extending the operating life by reduced speed of corrosion due to a special alloy plate• VdS / UL approval