Amazon.com: Replacement Battery for GRESSOCruiser Grand Luxor Regal Nokia BL -4CT : Cell Phones & Accessories
Battery BL-4CT compatible with Nokia 5310, X3-00, (Li-ion, 3.7 V, 850 mAh, Original (PRC)) - GsmServer
2100mAh BL-4CT BL4CT BL 4CT Battery for Nokia 5630 5310 6700S X3 X3-00 5300XM 27 | eBay
Replacement Battery BL-4CT Battery for Nokia 7310 Supernova
Synergy Digital Cell Phone Battery, Works with Nokia 6700 Slide Cell Phone, (Li-Ion, 3.7V, 820 mAh) Ultra High Capacity, Compatible with Gresso BL-4CT Battery - Walmart.com
New 3700mah Bl-4ct Bl4ct High Capacity Li-ion Phone Battery For Nokia 5310 5630xm 7212c 7210c 6600f - Mobile Phone Batteries - AliExpress
Phone Battery Bl4ct Bl-4ct Bl4ct Bl 4ct For Nokia 5310 6600 6700s X3 X3-00 Slide/7210 7230 7310c 5630 2720 2720a 7210c 6600f - Mobile Phone Batteries - AliExpress
File:Nokia X3-00 - Li-Ion battery NOK BL-4CT-5310-3268.jpg - Wikimedia Commons
Ciszean 860mah Bl-4ct Bl 4ct Bl4ct Replacement Battery + Lcd Charger For Nokia 5310 6700s X3 X3-00 7230 7310c 5630 2720 2720a - Mobile Phone Batteries - AliExpress