Sony Clié PEG-SJ33 / NX70 / NX80V Battery Teardown Guide

A dead battery is the most common reason a classic Sony Clié gets retired. The PEG-SJ33, PEG-NX70, and PEG-NX80V are still capable PDAs, but their original cells are now decades old. If your Clié shuts down early, resets randomly, or has a swollen battery, replacing the battery is the practical fix.

Replacement battery:
🔋 STARNOVO Sony Clié PEG-SJ33 / NX70 / NX80V PDA Replacement Battery

Before You Open the Device

  • Sync and back up your data first.

  • Power off the Clié.

  • Remove the Memory Stick and stylus.

  • Work on a clean, well-lit surface.

  • Take photos before disconnecting anything.

These devices use old, brittle plastic. Do not force panels or connectors. If you are not comfortable with fine electronics repair, have a professional do the job.

Tools you’ll need:

  • Small Phillips screwdriver (PH00 or PH000)

  • Plastic pry tool

  • Tweezers

  • Isopropyl alcohol (90%+)

  • Replacement battery

Step-by-Step Battery Replacement

1. Open the housing

PEG-SJ33:
Remove the rear screws and gently separate the back cover with a plastic pry tool.

PEG-NX70 / NX80V:
These clamshell models are more involved. Remove the screws around the rear housing and battery area. Be extremely careful around the hinge and display ribbon cables. Do not pull the case apart.

2. Locate the battery

Find the battery and note how the wires are routed. Take a photo before removing anything.

3. Disconnect the old battery

Release the battery connector from its socket. Pull the connector, not the wires. If there is a locking tab, lift it first.

4. Remove the old battery

If the battery is adhered to the chassis, apply a small amount of isopropyl alcohol along the edge. Wait a few seconds, then lift it slowly with a plastic card or spudger.

Never puncture or bend a lithium-ion battery.

5. Install the new battery

Connect the new battery to the socket first. Make sure it is fully seated and correctly oriented. Then place the battery into its compartment and route the wires through the original channels, away from screws, hinges, and moving parts.

6. Test before closing

Press the power button. If the device boots, reassemble the housing. If it does not, disconnect and reconnect the battery, then charge for 30 minutes and try again.

7. Charge and calibrate

Charge the Clié fully. Then use it until it shuts down automatically. Recharge fully again. Repeat this cycle two or three times so the battery meter reads accurately.

Model-Specific Notes

Sony Clié PEG-SJ33

  • Simpler internal layout.

  • Watch for speaker wires and small plastic clips.

Sony Clié PEG-NX70 / NX80V

  • Clamshell design with fragile ribbon cables near the hinge.

  • Battery may sit under the keyboard or rear panel.

  • Work slowly and avoid twisting the display assembly.

Troubleshooting

Device won’t power on after replacement

  • Reseat the battery connector.

  • Charge for at least 30 minutes.

  • Try a hard reset.

  • Confirm the battery voltage and connector match the original.

Battery meter is inaccurate

  • Run two or three full discharge/charge cycles.

Old battery is swollen

  • Stop using it immediately.

  • Do not puncture, bend, or throw it in the trash.

  • Dispose of it at a local battery recycling center.

Charging still fails

  • Check the cradle contacts, charging cable, and power adapter.

  • Clean the charging contacts with isopropyl alcohol.

Final Thoughts

Replacing the battery is the most effective way to keep a Sony Clié alive. With the right replacement cell and a careful teardown, your PEG-SJ33, NX70, or NX80V can return to daily use without the risk of a swollen battery damaging the device.

🔋 Order the replacement battery:
STARNOVO Sony Clié PEG-SJ33 / NX70 / NX80V PDA Replacement Battery

Contact us:
For compatibility help, wholesale orders, or custom battery packs, email sales@starnovo.com.

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