Custom Ultra-Thin Battery Solution for a European Smart Lighting Brand

Client Background

Our client is a German-based smart home lighting brand specializing in human body induction night lights, closet sensor lights, and corridor infrared lighting fixtures. Their products are sold across major EU markets through both online retail and brick-and-mortar home improvement chains. Their next-generation ultra-thin induction lamp series was designed with a housing thickness of just 8.5mm, requiring an embedded battery that could fit into the narrow internal cavity while delivering extended standby time and instantaneous high-current output for LED triggering.

Client Challenges

• Standard off-the-shelf batteries exceeded the thickness limit and could not be accommodated in the ultra-thin lamp housing

• High standby current consumption led to frequent recharging, generating numerous end-user complaints and returns

• Significant voltage sag during sensor trigger events resulted in dim LED output or delayed illumination response

• Inconsistent batch quality from previous suppliers caused battery swelling during sea freight transit, damaging brand reputation

Our Solution

After a thorough on-site technical assessment of the client's PCB layout, power consumption profiles, and assembly workflow, our engineering team recommended and customized the 8017120 3.7V 1600mAh lithium polymer pouch cell specifically for this application:

• Cell thickness of just 8.0mm, perfectly fitting the 8.5mm internal cavity with sufficient clearance for assembly

• Optimized electrode formulation enabling stable low-current discharge at 0.5mA standby, reducing overall standby power consumption by 62%

• Custom-designed protection circuit module (PCM) with ultra-low internal resistance to maintain voltage drop under 0.3V during instantaneous 1.2A induction trigger events, ensuring full LED brightness output

• 100% full inspection of capacity, internal resistance, and open-circuit voltage for every cell prior to shipment, guaranteeing batch-to-batch consistency

• Custom 70mm flexible lead wires terminated with JST 1.25mm connectors for streamlined SMT assembly on the client's production line

Implementation Results

• Achieved 98 days of actual standby time in real-world usage, exceeding the client's 90-day target by nearly 9%

• Induction response time consistently measured under 0.2 seconds with no flicker or brightness degradation

• Successfully delivered 50,000 units across three production batches with a field failure rate below 0.3%

• All batteries passed CE, RoHS, and UN38.3 certification with full documentation, clearing EU customs without delays

• Client reorder rate reached 100%, with three follow-up new product lines also awarded to our company as the exclusive battery supplier