High matla li-transformer tsa kabo ea tšebeliso li bua haholo ka SJ, SJL, SL7, S7 le li-transformer tse ling tsa letoto. Tahlehelo ea bona ea tšepe le tahlehelo ea koporo e phahame haholo ho feta ea li-transformer tsa S9 tse sebelisoang haholo hajoale. Ka mohlala, ha ho bapisoa le S9, tahlehelo ea tšepe ea S7 ke 11% e phahameng ‘me tahlehelo ea koporo ke 28% e phahameng. Leha ho le joalo, li-transformer tse ncha, tse kang S10 le S11, li boloka matla ho feta S9, ‘me tahlehelo ea tšepe ea amorphous alloy transformer ke 20% feela ea S7. Ka kakaretso, bophelo ba tšebeletso ea transformer bo nka lilemo tse mashome. Ho fetola sefetoleli se sebelisang matla a phahameng ka mokhoa o phahameng oa ho boloka matla ha se feela ho ntlafatsa ts’ebetso ea phetolo ea matla, empa hape ho fihlela phello e kholo ea ho boloka matla nakong ea bophelo ba ts’ebeletso.