Calculators

Sharp EL-8130 battery

2 × 1.55V silver oxide button cell

How to replace it

How to open	Legacy service access — open the case per Sharp service documentation, replace both silver-oxide cells, reseat covers. Prefer a technician if you are not comfortable with service disassembly.
Orientation	Match factory cell polarity / service diagram
Re-pair / reset	Yes
Access	Professional recommended
Notes	Replace both cells together. Usable time cited ~600H in service docs.

OEM specifies silver oxide (G-10 / SR-1130 / 389 / RW49) — not LR1130 / AG10 alkaline.
Legacy calculator; battery access may require tools and careful reassembly.
Button cells are a choking hazard — keep new and used cells away from children.

Last checked 9 October 2026

Sharp EL-8130 uses 2 × SR1130.

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Optional tools for opening, testing or charging — separate from the battery answer.

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Voltage alone does not establish usable capacity, especially for rechargeables.
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A fresh 2 × SR1130 should restore Sharp EL-8130 if the battery was the problem. Work through the checks below before replacing the device.

Check orientation
Confirm the cell is seated correctly: Match factory cell polarity / service diagram
Check the battery type
This device needs 2 × SR1130 (silver_oxide). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
Check known model-specific issues
Re-pairing or a short reset may be required after a battery change. OEM specifies silver oxide (G-10 / SR-1130 / 389 / RW49) — not LR1130 / AG10 alkaline. Legacy calculator; battery access may require tools and careful reassembly. Button cells are a choking hazard — keep new and used cells away from children.
Confirm the battery itself
For most coin cells, fitting a known-good fresh cell of the correct code is simpler than capacity testing.
Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.

These checks follow this device’s orientation, battery type, and important notes from the maker.