Nkhongono za batire zikuyowoya za nkhongono izo batire lingafumiska pasi pa boma linyake lakufumiskika, ilo kanandi likulongosoreka mu W·h panji kW·h. Nkhongono za mabatire zikugaŵika chomene mu mitundu iyi:
(1) Nkhongono za Chisambizgo
Kughanaghana kuti batire lili mu equilibrium pa nyengo yakufumiskika, magesi ghake ghakufumiskika ghakusunga mtengo wa nkhongono ya electromotive (E), ndipo chiŵelengero cha kugwiriskira ncito kwa vinthu ivyo vikugwira nchito ni 100%, ndiko kuti, nkhongono ya kufumiska ni nkhongono ya theoretical, mbwenu nkhongono izo zikufuma mu vigaŵa ivi ni nkhongono ya theoretical W₀, ndiko kuti.
(2) Kuyowoya unenesko
Nkhongono yeneco yikung’anamura nkhongono izo zikufuma nadi na batire pa nyengo yakufumiskika. Pa nambala, vikuyana waka na chigaŵa cha magesi cha batiri, nyengo yakufumiramo, na nyengo yakufumiska, ndiko kuti .
Mu mapulogalamu ghakugwira ntchito gha uinjiniya, nkhongono yeneco ya batire kanandi yikupimika mwakugwiliskira nchito vyose viŵiri, nkhongono zakupimika za batire na magesi ghakupokera gha batire.
Chifukwa chakuti vinthu ivyo vikugwira ntchito vingagwiliskirika ntchito mwakukwana yayi, magesi ghakugwira ntchito gha batire nyengo zose ghakuŵa ghachoko chomene kuluska nkhongono zake za magesi, ntheura nkhongono yeneco ya batire nyengo zose yikuŵa yichoko kuluska nkhongono zake zakusambizga.
(3) Ntchito yose
Nkhongono zose zikung’anamura nkhongono zose za magesi za batire pa nyengo ya umoyo wake, iyo yikupimika mu W·h.
(4) Kulimbikiska Nkhongono
Nkhongono yakucimbizga yikung’anamura nkhongono ya magesi iyo yikunjira mu batire kwizira mu kuŵika magesi, iyo yikupimika mu W·h.
(5) Nkhongono za Kufumiska
Nkhongono yakufumiska yikung’anamura nkhongono ya magesi iyo yikufuma mu batire pa nyengo yakufumiskika, iyo yikupimika mu W·h. Nkhongono ya batire, panji nkhongono izo unit panji unit volume ya batire yingafumamo, yikuchemeka kuti nkhongono zinandi. Kuchuluka kwa vigaŵa (W·h / kg) na nkhongono ya buku (W·h / L), ivyo vikumanyikwaso kuti nkhongono panji nkhongono za voliyumu, ni vimanyikwiro vyakuzirwa vyakuwonera mtundu wa mabatire gha nkhongono. Mu mapulogalamu gha galimoto ya magesi, nkhongono zakudunjika za batire zikukhwaska kulemera kwa galimoto yose na mtundu wa kwendeska galimoto, apo nkhongono ya voliyumu yikukhwaska malo ghakuŵikamo batire. Nkhongono zapadera nako nchilongolero cakuzirwa comene pakuyaniska umo mitundu yakupambanapambana ya mabatire yikucitira. Nkhongono zapadera zikugaŵika mu nkhongono zakusambizga (W₀) na nkhongono yeneco (W').
Nkhongono zakumanyikwa zakumanyikwa zikuyana na nkhongono za theoretical, kuyowoya za nkhongono izo zingaŵa zakufumiramo para unit misa panji unit voliyumu ya mabatire ghakufumiskika mwakukwana. Nkhongono yeneco yapadera yikuyana na nkhongono yeneco, kwimira nkhongono yeneco iyo yikufumiskika apo unit misa panji unit volume ya mabatire ghakufumiskika mwakukwana. Iwo ukumanyikwa na chiŵelengero cha nkhongono yeneco ya batiri nadi ku unandi wake (panji buku).
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Mu fomula, C-----li kukuyimira unandi wa batire; V--yikuyimira buku la batire. Chifukwa cha vinthu vyakupambanapambana, nkhongono yeneco ya batire njakucepa comene kuluska nkhongono zake zakusambizga. Ubale pakati pa nkhongono yeneco na ya visambizgo ungalongosoreka nga ni ivi:
Mu fomula, K__ wakuyimira nkhongono ya magesi; K_B yikwimira nkhongono zakuchitira vinthu; ndipo K_m yikwimira nkhongono zakukhozga.
Mu kugwiriskira ncito mabatire gha magesi mu magalimoto gha magesi, nkhongono yeneco ya batire yikucepa kuluska nkhongono zakumanyikwa za maselo gha batiri gha munthu payekha cifukwa kuŵika mabatire gha pa batire kukukhumbikwira matochi ghakuyana waka, mawaya ghakukoleska, vipangizo vyakuvikilira magesi na magesi, na vinyake. Nkhongono ya batire ya batire yikupimika mwa kuchulukizga nkhongono za maselo gha batire gha munthu payekha na chinthu cha kupakira. Chinthu chakuŵikamo batire lakumanyikwa ni 0.6 kufika pa 0.8. Apo msinkhu wa kapangilo ka batire ukukura, kuphatikizgika kwa batire kukukura. Ntheura, nkhongono zakumanyikwa za batire kanandi nchilongolero cakuzirwa ca umo mabatire ghakugwilira nchito. Kuyowoya mwakudumura, nkhongono ya unandi wa batire pack yikujumpha 20% pasi pa nkhongono zakumanyikwa za maselo gha batire gha munthu payekha.
