12V Battery Tester
Auto Battery Charger
2 in 1
BC521
CHARGING VOLTAGE | 14.4/14.7/15.8V |
CHARGING CURRENT | Max 5A |
TYPE OF CHARGER | 8 step, fully automatic charging cycle |
TYPE OF BATTERY | 12V lead-acid batteries |
BATTERY CAPACITY | 1.2-110Ah, up to 160Ah for maintenance |
charging system test.











Our packaging is simple yet effective, with customization options available to suit your specific branding or logistical needs..

Established in 2005, Shenzhen Leagend Optoelectronics Co., Ltd. is a pioneer in battery monitoring and testing technology. We seamlessly integrate product design, R&D, production, sales, and service to deliver world-class solutions. Our expansive 3,000 square meter factory upholds the rigorous standards of the ISO9001 quality management system. Every product endures an 8-hour aging test, guaranteeing unmatched quality. We enthusiastically invite OEM and ODM partnerships. Whether you're choosing from our current catalog or need engineering expertise for custom applications, our dedicated customer service team is ready to meet all your sourcing needs with unparalleled support.


A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent,
we can pack the goods in your branded boxes after getting your authorization letters.
Q2. What are your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages
before you pay the balance.
Q3. What are your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU.
Q4. How about your delivery time?
A: Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time depends
on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and
the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive prices to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,
no matter where they come from.