Long Lasting Rechargeable Sonic Electric Toothbrush – IPX7 Waterproof PTR-C4, PTR-C8, PTR-C9S With Ergonomic Handle Design

If you’re looking for a durable, water-safe oral care device that won’t die mid-trip, our long lasting rechargeable sonic electric toothbrush PTR series is your ideal pick. All three models PTR-C4, PTR-C8 and PTR-C9S integrate advanced IPX7 sealing technology, ergonomic one/two-button layout and ultra-long-life 18650 lithium battery. Every detail is optimized for long-term daily use, from wear-resistant buttons to stable high-frequency motors, meeting demands of household users, frequent travelers and brand wholesalers.

IPX7 Full Waterproof Sealing Craft Of Our Long Lasting Rechargeable Sonic Electric Toothbrush

Many cheap electric toothbrushes leak water after months of use, leading to circuit failure. Our long lasting rechargeable sonic electric toothbrush adopts dual sealing structure to reach IPX7 standard:

• Multi-layer rubber ring sealing at brush head connection and Type-C charging tail, block water penetration effectively.
• Pass strict 30-minute 1-meter deep water soaking test before mass production, no internal water residue after disassembly.
• Vacuum pressure inspection for each finished product to eliminate tiny gaps that cause water leakage.
• Note: Though fully washable under running water, avoid long-time hot steam in shower room to protect breathable valve inside the handle.

Ergonomic Button & Handle Design For Comfortable Daily Operation

Different button layouts are designed for PTR-C4, PTR-C8 and PTR-C9S to match different usage habits, all passing 20,000 times button service life test:

PTR-C4 & PTR-C9S: Single One-Button Minimalist Control

PTR-C4 and PTR-C9S only equip one integrated button, operation force controlled between 0.4-1.2kgf for comfortable press feeling. One-click startup, short press to switch modes within 5 seconds, long press 2s to shut down. The PC+ABS high-gloss button surface resists oil and fingerprint, keeps clean after long-term holding. Slim curved handle fits palm perfectly, won’t slip when hands are wet.

PTR-C8: Dual Independent Buttons For Mode & Intensity Adjustment

The flagship PTR-C8 adds an independent intensity adjustment button besides the power key, allowing users to switch strong/medium/weak vibration without re-entering modes. The dual-button design supports kid lock: long press two buttons together for 3 seconds to lock all adjustment functions, prevent children from misoperation. Electroplated decorative parts on buttons improve texture for high-end gift positioning.

High Durability Sonic Motor & Stable Vibration Performance

The core motor of each long lasting rechargeable sonic electric toothbrush undergoes strict cycle aging test:

1. Test standard: run 5 minutes, pause 5 minutes, cycle more than 2200 times without abnormal noise or vibration drop.
2. Vibration frequency range 263Hz-294Hz, corresponding speed from 31560RPM to 35280RPM, speed error within ±500RPM is normal.
3. Whole machine noise ≤60dB with or without brush head, low-frequency shock reduces gum soreness for sensitive oral users.
4. Even after 18 hours continuous load test, the motor still maintains consistent cleaning power without attenuation.

2000mAh Large Battery & Complete Multi-Layer Protection Circuit

The core advantage of our long lasting rechargeable sonic electric toothbrush lies in the high-capacity 3.7V 18650 lithium battery:

• Full charge takes over 4 hours via DC 5V 1A Type-C cable, continuous working time up to 6 hours without load.
• Built-in independent protection board with over-charge (4.2V cutoff), over-discharge (3.0V cutoff), over-current and short-circuit protection.
• Multi-stage low voltage reminder: flash red light and vibrate 3 times when voltage below 3.5V; auto power off under 3.0V to extend battery cycle life up to 300 full charge-discharge cycles.
• PTR-C8 equips three LED power indicator lights to show real battery level during charging for intuitive power judgment.

Premium Detachable Dupont Brush Head Matching

All PTR models share universal replacement brush heads made of soft USA Dupont bristles:

Model Selection Guide For Different Buyers

1. Family daily low-budget demand: Choose PTR-C4, single button 5 complete cleaning modes, cost-effective full-featured model.

2. High-end gift & multi-intensity demand: Choose PTR-C8, 15 adjustable vibration combinations + kid lock, three power display lights for premium packaging.

3. Travel & hotel matching demand: Choose PTR-C9S, ultra-light 135.2g weight, simplified 3 core modes, save luggage space.

Global Certifications & Wholesale Support

Every batch of long lasting rechargeable sonic electric toothbrush passes CE, FCC, RoHS and FDA certifications, fully compliant with cross-border e-commerce sales rules. We offer flexible cooperation: small trial orders, mass container wholesale, OEM laser logo, customized color box, personalized brush head kits. Professional after-sales inspection standard ensures low defective rate for all bulk shipments.

Daily Care Tips To Extend Service Life

1. Charge fully for the first use to activate maximum battery capacity.
2. Wash brush head and handle with running water after brushing, place in dry ventilated position.
3. Do not pull the charging cable violently to avoid damage to internal charging components.
4. Do not drop the toothbrush from height frequently, though it passes 1m drop test, repeated impact will shorten motor lifespan.