Yuasa's unique construction and sealing technique ensures that no electrolyte leakage should occur from the terminals or case of any NP battery This feature provides for safe and effective operation of NP batteries in any orientation. Yuasa NP batteries are classified as "Non Spillable" and meet all requirements to the International Air Transport Association (l. A. T.A  Dangerous Goods Regulations).

All Yuasa NP batteries utilise an electrolyte suspension system consisting of a glass fibre separator material. This suspension system helps to achieve maximum service life, by fully retaining the electrolyte and preventing its escape from the separator material. No silica gels or other contaminants are used.

NP batteries incorporate a unique Yuasa design that effectively recombines over 99% of the gas generated during normal usage.

During the life of NP batteries, there is no need to check their specific gravity or add water etc. In fact, there are no provisions for such maintenance functions to be carried out.

The combination of sealed construction and Yuasa's electrolyte suspension system permits operation of NP batteries in any orientation (excluding continuous inverted use) without loss of capacity, electrolyte, or service life. The NP batteries made in our factory in Wales also conform to BS EN61056-1 (1993) and IEC 10561 (1991).

Yuasa NP batteries are equipped with a safe, low pressure venting system, which is designed to release excess gas and reseal automatically in the event of the internal gas pressure rising to an unacceptable level- This low pressure venting system, coupled with the significantly high recombination efficiency, make Yuasa NP batteries one of the safest valve regulated lead acid batteries available.

The heavy duty lead calcium alloy grids in NP batteries provide an extra margin of performance and service life in both float and cyclic applications, even in conditions of deep discharge.

Depending upon the average depth of discharge, over 1,000 discharge/ recharge cycles can be expected from NP batteries.

The expected service life of the standard model NP battery when used in standby applications is typically 5 years; however, experience has shown that their service life often exceeds 6 years, if the NP batteries are operated strictly within specification.

At temperatures of between 20 & 25°C, the self discharge rate of NP batteries per month is approximately 3% of their rated capacity. This low self discharge rate permits storage for up to one year without any appreciable deterioration of battery performance.

Yuasa NP batteries can be used over a broad range of ambient temperatures, allowing considerable flexibility in system design and location.

Yuasa NP batteries have excellent charge acceptance and recovery capability, even after very deep discharge.