EAC63379202 LG PH450U Replacement Battery 7.4V 3000mAh
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EAC63379202 LG PH450U Replacement Battery 7.4V 3000mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
EAC63379202 LG PH450U Replacement Battery 7.4V 3000mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
3000mAh
LG PH450U / PH450UG — 7.4V Li-ion Replacement Battery (EAC63379202)
This is a 7.4V, 3000mAh Li-ion battery for the LG PH450U and PH450UG portable projectors. It slots into the same battery bay as the original EAC63379202 cell and restores untethered operation. Use this when the original pack no longer holds a charge or the projector shuts off earlier than it used to.
- PH450U and PH450UG compatibility: Both models run the same 7.4V battery rail with the same connector and BMS handshake protocol. One cell covers both variants — no wiring or adapter differences between them.
- Bench tested on actual hardware: We cycled this pack on a PH450U and confirmed the BMS accepted the cell, reported charge state correctly, and held stable voltage through full discharge to the projector's cutoff threshold.
- Eco mode draw on battery: Set the projector to eco brightness before unplugging from mains. Full lamp brightness pulls 30–40% more current than eco mode. The lamp requires a higher minimum voltage than the fuel gauge empty indicator — the projector will shut off before the battery reads flat if the draw is too high.
Why the PH450U cuts out before the battery indicator reaches empty
The PH450U's lamp has a higher minimum operating voltage than the BMS low-voltage cutoff. At full brightness, current draw pulls the cell voltage below the lamp's floor before the battery gauge reads zero. The projector interprets this as a hard fault and kills the lamp to protect the cell. Running eco mode keeps current draw low enough that the lamp stays above its minimum voltage all the way to actual battery cutoff — around 6.0V under load.
Projector not detecting a new battery after swap
If the PH450U shows no battery icon or refuses to start on the new cell, the BMS may need a recognition cycle. Plug the projector into mains with the new battery installed and let it charge uninterrupted until the charge indicator goes solid. This completes the initial BMS handshake. If the projector still doesn't register the pack, check that the battery contacts are fully seated — the bay latch must click closed before the BMS can communicate with the cell.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: LG
- Manufacturer: CS
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My LG PH450U shuts off mid-presentation even though the battery indicator shows charge remaining — what's happening?
The lamp requires a higher minimum voltage than the battery's low-voltage cutoff point. Under full-brightness load, cell voltage sags below the lamp's floor before the gauge reads empty, so the projector cuts the lamp as a protection measure. Switch to eco brightness mode — it reduces current draw enough to keep voltage above that threshold through the full discharge cycle. If the problem persists on a worn cell, the internal resistance is too high and the pack needs replacing.
The battery charges in the projector but the charge light never turns off — is the charger working correctly?
The PH450U's internal charger uses a constant-current, constant-voltage profile matched to the original cell's capacity and chemistry. If the termination light stays on indefinitely, the BMS may not be reading a proper end-of-charge signal from the new cell. Remove the battery, reinsert it firmly until the latch clicks, then reconnect mains. The charge indicator should cycle through and terminate cleanly once the BMS completes its recognition handshake — termination voltage is 8.4V.
Lamp output looks noticeably dimmer on battery than when running on mains — is the battery faulty?
This is normal projector behaviour, not a battery fault. The PH450U actively reduces lamp power when running on battery to manage current draw and protect the cell. You will see a measurable drop in lumen output compared to mains operation regardless of battery condition. If brightness drops progressively during a single session rather than staying consistent, that points to voltage sag from a degraded cell — check the pack's resting voltage with a multimeter, which should read above 7.0V after a full charge.
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