SUNNEAR Replacement Laptop Battery for Dell Chromebook 3100/3400 JPFMR 11.4V 42Wh (3500mAh) — 3-Cell Pack with Installation Tools

The SUNNEAR 42Wh JPFMR is a direct-replacement 11.4V, 3500mAh 3-cell battery engineered to restore portable power to compatible Dell Chromebook and notebook models.

If your Dell Chromebook 3100, 3400, or select 5488/5493/5593 series machine is showing shortened runtimes, unexpected shutdowns, or battery errors, this SUNNEAR JPFMR pack matches the original specifications and comes with installation tools for a straightforward swap. It’s built to fit the listed part numbers and connectors so you don’t have to compromise on fit or basic performance.

Which Dell models and part numbers will this battery work with?

This replacement is designed for a range of Dell Chromebooks and notebooks where the factory battery uses the JPFMR or equivalent part codes. Always verify the battery label inside your laptop before ordering to ensure compatibility.

• Compatible series: Dell Chromebook 3100, 3100 2-in-1, 3400, and select 5488/5493/5593 models
• Recognized part numbers: JPFMR, 16DPH, 65N6H, 7T0D3, 07GDY, 7MT0R, DN33X, RDNP5
• Specification match: 11.4V nominal voltage and 42Wh / 3500mAh capacity

How do I install the SUNNEAR JPFMR battery safely?

Installation is intended to be user-friendly but requires basic tools and attention to static-safety. The pack includes simple tools and the connector layout mirrors OEM designs — remove the back cover, unplug the old battery, and secure the new battery in the same mounting points.

• Power down and unplug the laptop before opening the case
• Use included tools to remove screws and access the battery compartment
• Disconnect the old battery connector gently and connect the new JPFMR pack firmly
• Reinstall screws and run the battery through 3–4 charge cycles for calibration

What should I do if the laptop doesn’t recognize the new battery?

If the new pack isn’t detected immediately, double-check the connector seating and try reseating the battery. It’s common for replacement batteries to require a short calibration routine or reconnection to be recognized by the system firmware.

• Ensure the battery cable is fully plugged into the motherboard connector
• If unrecognized, remove and reconnect the connector, then reassemble
• Discharge to about 5% (do not force to 0%), then charge fully and repeat 3–4 times

What are the safety and purchasing notes I should consider?

Battery models can vary even inside the same laptop family; check the printed model number on your existing battery before purchase. Follow standard lithium-ion safety: avoid extreme heat, do not puncture the pack, and use the original or equivalent charger for charging cycles.

• Open the laptop back cover to confirm the original battery model number before ordering
• Avoid exposure to water and high temperatures; store at moderate temperatures
• If battery swelling or abnormal heating occurs, stop use and replace the battery immediately

Who this is for: The SUNNEAR 42Wh JPFMR replacement is for students, teachers, IT admins, and everyday users who need a reliable swap-in battery for Dell Chromebook 3100/3400 families or compatible 5488/5493/5593 series systems. It’s best suited to owners who can open their laptop’s back panel, confirm the part number, and follow basic installation steps. If you’re restoring an older device to full mobility without upgrading the device, this pack provides a like-for-like spec match and arrives with tools and clear tips for initial calibration.